Chorulon may be available in the countries listed below.
In some countries, this medicine may only be approved for veterinary use.
Chorionic Gonadotrophin is reported as an ingredient of Chorulon in the following countries:
International Drug Name Search
Aldactazine may be available in the countries listed below.
Altizide is reported as an ingredient of Aldactazine in the following countries:
Spironolactone is reported as an ingredient of Aldactazine in the following countries:
International Drug Name Search
Allerid C may be available in the countries listed below.
Cetirizine dihydrochloride (a derivative of Cetirizine) is reported as an ingredient of Allerid C in the following countries:
International Drug Name Search
Ciplaefavir may be available in the countries listed below.
Efavirenz is reported as an ingredient of Ciplaefavir in the following countries:
International Drug Name Search
Bismucar may be available in the countries listed below.
Bismuth Subsalicylate is reported as an ingredient of Bismucar in the following countries:
International Drug Name Search
In the US, Kay Ciel (potassium chloride systemic) is a member of the drug class minerals and electrolytes and is used to treat Hypokalemia and Prevention of Hypokalemia.
US matches:
Potassium Chloride is reported as an ingredient of Kay Ciel in the following countries:
International Drug Name Search
Cinnarizine PCH may be available in the countries listed below.
Cinnarizine is reported as an ingredient of Cinnarizine PCH in the following countries:
International Drug Name Search
Methacycline may be available in the countries listed below.
Methacycline (BAN, USAN) is also known as Metacycline (Prop.INN)
International Drug Name Search
Glossary
| BAN | British Approved Name |
| Prop.INN | Proposed International Nonproprietary Name (World Health Organization) |
| USAN | United States Adopted Name |
Atenolol Pliva may be available in the countries listed below.
Atenolol is reported as an ingredient of Atenolol Pliva in the following countries:
International Drug Name Search
Xatger may be available in the countries listed below.
Alfuzosin hydrochloride (a derivative of Alfuzosin) is reported as an ingredient of Xatger in the following countries:
International Drug Name Search
Triamcinolon Acetonid may be available in the countries listed below.
Triamcinolone 16α,17α-acetonide (a derivative of Triamcinolone) is reported as an ingredient of Triamcinolon Acetonid in the following countries:
International Drug Name Search
Conzep may be available in the countries listed below.
Dilazep dihydrochloride (a derivative of Dilazep) is reported as an ingredient of Conzep in the following countries:
International Drug Name Search
Beclosil may be available in the countries listed below.
Beclometasone 17α,21-dipropionate (a derivative of Beclometasone) is reported as an ingredient of Beclosil in the following countries:
International Drug Name Search
Timat may be available in the countries listed below.
Budesonide is reported as an ingredient of Timat in the following countries:
International Drug Name Search
Glucadol may be available in the countries listed below.
Glucosamine sulfate (a derivative of Glucosamine) is reported as an ingredient of Glucadol in the following countries:
International Drug Name Search
Paracetamol Edigen may be available in the countries listed below.
Paracetamol is reported as an ingredient of Paracetamol Edigen in the following countries:
International Drug Name Search
Epirubicin Ebewe may be available in the countries listed below.
Epirubicin is reported as an ingredient of Epirubicin Ebewe in the following countries:
Epirubicin hydrochloride (a derivative of Epirubicin) is reported as an ingredient of Epirubicin Ebewe in the following countries:
International Drug Name Search
Thompson's Vitamin B6 may be available in the countries listed below.
Pyridoxine hydrochloride (a derivative of Pyridoxine) is reported as an ingredient of Thompson's Vitamin B6 in the following countries:
International Drug Name Search
Tantum Lozenges may be available in the countries listed below.
Benzydamine hydrochloride (a derivative of Benzydamine) is reported as an ingredient of Tantum Lozenges in the following countries:
International Drug Name Search
Mevalect may be available in the countries listed below.
Pravastatin sodium salt (a derivative of Pravastatin) is reported as an ingredient of Mevalect in the following countries:
International Drug Name Search
Extal may be available in the countries listed below.
Acetylcysteine is reported as an ingredient of Extal in the following countries:
International Drug Name Search
In some countries, this medicine may only be approved for veterinary use.
Miconazole nitrate (a derivative of Miconazole) is reported as an ingredient of Miconosol in the following countries:
International Drug Name Search
Metrina may be available in the countries listed below.
Ergometrine maleate (a derivative of Ergometrine) is reported as an ingredient of Metrina in the following countries:
International Drug Name Search
In the US, Berinert (C1 esterase inhibitor (human) systemic) is a member of the drug class miscellaneous coagulation modifiers and is used to treat Hereditary Angioedema.
US matches:
UK matches:
C1 Esterase Inhibitor, human is reported as an ingredient of Berinert in the following countries:
International Drug Name Search
Glossary
| SPC | Summary of Product Characteristics (UK) |
Tamec may be available in the countries listed below.
Tamoxifen citrate (a derivative of Tamoxifen) is reported as an ingredient of Tamec in the following countries:
International Drug Name Search
Fluphenazin-neuraxpharm may be available in the countries listed below.
Fluphenazine decanoate (a derivative of Fluphenazine) is reported as an ingredient of Fluphenazin-neuraxpharm in the following countries:
International Drug Name Search
Ketocev may be available in the countries listed below.
Ketotifen fumarate (a derivative of Ketotifen) is reported as an ingredient of Ketocev in the following countries:
International Drug Name Search
Pandomil may be available in the countries listed below.
Sertraline is reported as an ingredient of Pandomil in the following countries:
International Drug Name Search
Rahistin may be available in the countries listed below.
Loratadine is reported as an ingredient of Rahistin in the following countries:
International Drug Name Search
In the US, Thyrolar (liotrix systemic) is a member of the drug class thyroid drugs.
US matches:
Levothyroxine sodium salt (a derivative of Levothyroxine) is reported as an ingredient of Thyrolar in the following countries:
Liothyronine is reported as an ingredient of Thyrolar in the following countries:
International Drug Name Search
Pentoxifylline-1A may be available in the countries listed below.
Pentoxifylline is reported as an ingredient of Pentoxifylline-1A in the following countries:
International Drug Name Search
Tramadol Sanitas may be available in the countries listed below.
Tramadol hydrochloride (a derivative of Tramadol) is reported as an ingredient of Tramadol Sanitas in the following countries:
International Drug Name Search
Levosan may be available in the countries listed below.
Levocarnitine is reported as an ingredient of Levosan in the following countries:
International Drug Name Search
Eposal may be available in the countries listed below.
Carbamazepine is reported as an ingredient of Eposal in the following countries:
International Drug Name Search
Aprowell may be available in the countries listed below.
Naproxen sodium salt (a derivative of Naproxen) is reported as an ingredient of Aprowell in the following countries:
International Drug Name Search
Terafluss may be available in the countries listed below.
Terazosin hydrochloride (a derivative of Terazosin) is reported as an ingredient of Terafluss in the following countries:
International Drug Name Search
Phendimetrazine tartrate (a derivative of Phendimetrazine) is reported as an ingredient of Bontril in the following countries:
International Drug Name Search
Térazosine Merck may be available in the countries listed below.
Terazosin hydrochloride (a derivative of Terazosin) is reported as an ingredient of Térazosine Merck in the following countries:
International Drug Name Search
Felicium may be available in the countries listed below.
Fluoxetine is reported as an ingredient of Felicium in the following countries:
Fluoxetine hydrochloride (a derivative of Fluoxetine) is reported as an ingredient of Felicium in the following countries:
International Drug Name Search
Pantac may be available in the countries listed below.
Pantoprazole is reported as an ingredient of Pantac in the following countries:
International Drug Name Search
Metosyn may be available in the countries listed below.
Fluocinonide is reported as an ingredient of Metosyn in the following countries:
International Drug Name Search
Forderm may be available in the countries listed below.
Clobetasol 17α-propionate (a derivative of Clobetasol) is reported as an ingredient of Forderm in the following countries:
International Drug Name Search
In the US, Alophen (bisacodyl systemic) is a member of the drug class laxatives and is used to treat Bowel Preparation and Constipation.
US matches:
Bisacodyl is reported as an ingredient of Alophen in the following countries:
International Drug Name Search
Amfenac Sodium may be available in the countries listed below.
Amfenac Sodium (BANM, USAN) is also known as Amfenac (Rec.INN)
International Drug Name Search
Glossary
| BANM | British Approved Name (Modified) |
| Rec.INN | Recommended International Nonproprietary Name (World Health Organization) |
| USAN | United States Adopted Name |
Tramadol-EG may be available in the countries listed below.
Tramadol hydrochloride (a derivative of Tramadol) is reported as an ingredient of Tramadol-EG in the following countries:
International Drug Name Search
Beriplast P may be available in the countries listed below.
Coagulation Factor XIII, Human is reported as an ingredient of Beriplast P in the following countries:
International Drug Name Search
Andolex-C may be available in the countries listed below.
Benzydamine hydrochloride (a derivative of Benzydamine) is reported as an ingredient of Andolex-C in the following countries:
Chlorhexidine digluconate (a derivative of Chlorhexidine) is reported as an ingredient of Andolex-C in the following countries:
International Drug Name Search
Caspofungin diacetate (a derivative of Caspofungin) is reported as an ingredient of Intravenous Infusion Cancidas in the following countries:
International Drug Name Search
Touristil may be available in the countries listed below.
Cinnarizine is reported as an ingredient of Touristil in the following countries:
Domperidone is reported as an ingredient of Touristil in the following countries:
Domperidone maleate (a derivative of Domperidone) is reported as an ingredient of Touristil in the following countries:
International Drug Name Search
Ceftriaxona Sandoz may be available in the countries listed below.
Ceftriaxone disodium salt (a derivative of Ceftriaxone) is reported as an ingredient of Ceftriaxona Sandoz in the following countries:
International Drug Name Search
Hippiron may be available in the countries listed below.
In some countries, this medicine may only be approved for veterinary use.
Iron Dextran is reported as an ingredient of Hippiron in the following countries:
Iron Sucrose is reported as an ingredient of Hippiron in the following countries:
International Drug Name Search
Carbimazolo may be available in the countries listed below.
Carbimazolo (DCIT) is also known as Carbimazole (Rec.INN)
International Drug Name Search
Glossary
| DCIT | Denominazione Comune Italiana |
| Rec.INN | Recommended International Nonproprietary Name (World Health Organization) |
Cyproteron PCH may be available in the countries listed below.
Cyproterone 17α-acetate (a derivative of Cyproterone) is reported as an ingredient of Cyproteron PCH in the following countries:
International Drug Name Search
Mafel may be available in the countries listed below.
Progesterone is reported as an ingredient of Mafel in the following countries:
International Drug Name Search
Lamiter may be available in the countries listed below.
Terbinafine is reported as an ingredient of Lamiter in the following countries:
International Drug Name Search
Injectio Procaini Chlorati Ardeapharma may be available in the countries listed below.
Procaine hydrochloride (a derivative of Procaine) is reported as an ingredient of Injectio Procaini Chlorati Ardeapharma in the following countries:
International Drug Name Search
Enelbin may be available in the countries listed below.
Naftidrofuryl oxalate (a derivative of Naftidrofuryl) is reported as an ingredient of Enelbin in the following countries:
International Drug Name Search
Tacirel may be available in the countries listed below.
Trimetazidine dihydrochloride (a derivative of Trimetazidine) is reported as an ingredient of Tacirel in the following countries:
International Drug Name Search
Fremomet may be available in the countries listed below.
Mometasone 17-(2-furoate) (a derivative of Mometasone) is reported as an ingredient of Fremomet in the following countries:
International Drug Name Search
Rec.INN
0002485-62-3
C4-H9-N-O2-S
135
Mucolytic agent
L-Cysteine, methyl ester
International Drug Name Search
Glossary
| BAN | British Approved Name |
| BANM | British Approved Name (Modified) |
| DCF | Dénomination Commune Française |
| DCIT | Denominazione Comune Italiana |
| IS | Inofficial Synonym |
| OS | Official Synonym |
| Rec.INN | Recommended International Nonproprietary Name (World Health Organization) |
Tetraciclina La Santé may be available in the countries listed below.
Tetracycline is reported as an ingredient of Tetraciclina La Santé in the following countries:
International Drug Name Search
Terbutaline Sulfate (JAN, USAN) is known as Terbutaline in the US.
International Drug Name Search
Glossary
| JAN | Japanese Accepted Name |
| USAN | United States Adopted Name |
Loransil may be available in the countries listed below.
Lomefloxacin is reported as an ingredient of Loransil in the following countries:
International Drug Name Search
Beloc-Durules may be available in the countries listed below.
Metoprolol tartrate (a derivative of Metoprolol) is reported as an ingredient of Beloc-Durules in the following countries:
International Drug Name Search
Tyloral may be available in the countries listed below.
In some countries, this medicine may only be approved for veterinary use.
Tylosin tartrate (a derivative of Tylosin) is reported as an ingredient of Tyloral in the following countries:
International Drug Name Search
Theo-SR may be available in the countries listed below.
Theophylline is reported as an ingredient of Theo-SR in the following countries:
International Drug Name Search
Proneurin may be available in the countries listed below.
Promethazine hydrochloride (a derivative of Promethazine) is reported as an ingredient of Proneurin in the following countries:
International Drug Name Search
Alpha D3 may be available in the countries listed below.
Alfacalcidol is reported as an ingredient of Alpha D3 in the following countries:
International Drug Name Search
Enaladil may be available in the countries listed below.
Enalapril maleate (a derivative of Enalapril) is reported as an ingredient of Enaladil in the following countries:
International Drug Name Search
Insulin Zinc Suspension (Crystalline) may be available in the countries listed below.
Insulin Zinc Suspension (Crystalline) (BAN) is also known as Insulin Zinc Suspension (crystalline) (Rec.INN)
International Drug Name Search
Glossary
| BAN | British Approved Name |
| Rec.INN | Recommended International Nonproprietary Name (World Health Organization) |
Tevarelbine may be available in the countries listed below.
Vinorelbine is reported as an ingredient of Tevarelbine in the following countries:
International Drug Name Search
Alfuzosina EG may be available in the countries listed below.
Alfuzosin hydrochloride (a derivative of Alfuzosin) is reported as an ingredient of Alfuzosina EG in the following countries:
International Drug Name Search
In the US, Albenza (albendazole systemic) is a member of the drug class anthelmintics and is used to treat Ascariasis, Capillariasis, Cutaneous Larva Migrans, Cysticercus cellulosae, Echinococcus, Filariasis - Elephantiasis, Giardiasis, Gnathostomiasis, Hookworm Infection - Necator or Ancylostoma, Hydatid Disease, Liver Fluke, Microsporidiosis, Neurocysticercosis, Pinworm Infection - Enterobius vermicularis, Strongyloidiasis, Trichinosis, Trichostrongylosis, Visceral Larva Migrans - Toxicariasis and Whipworm Infection.
US matches:
Albendazole is reported as an ingredient of Albenza in the following countries:
International Drug Name Search
Tiparol Retard may be available in the countries listed below.
Tramadol hydrochloride (a derivative of Tramadol) is reported as an ingredient of Tiparol Retard in the following countries:
International Drug Name Search
Medezol may be available in the countries listed below.
Ketoconazole is reported as an ingredient of Medezol in the following countries:
International Drug Name Search
In the US, Retisert (fluocinolone ophthalmic) is a member of the drug class ophthalmic steroids and is used to treat Uveitis.
US matches:
Fluocinolone Acetonide is reported as an ingredient of Retisert in the following countries:
International Drug Name Search
Ea Ten may be available in the countries listed below.
Trihexyphenidyl hydrochloride (a derivative of Trihexyphenidyl) is reported as an ingredient of Ea Ten in the following countries:
International Drug Name Search
Avemix may be available in the countries listed below.
In some countries, this medicine may only be approved for veterinary use.
Sulfamethoxypyridazine sodium salt (a derivative of Sulfamethoxypyridazine) is reported as an ingredient of Avemix in the following countries:
Trimethoprim is reported as an ingredient of Avemix in the following countries:
International Drug Name Search
Leukase N Kegel may be available in the countries listed below.
Framycetin sulfate (a derivative of Framycetin) is reported as an ingredient of Leukase N Kegel in the following countries:
Lidocaine hydrochloride (a derivative of Lidocaine) is reported as an ingredient of Leukase N Kegel in the following countries:
International Drug Name Search
Anthramed may be available in the countries listed below.
Dithranol is reported as an ingredient of Anthramed in the following countries:
International Drug Name Search
Finimal may be available in the countries listed below.
Paracetamol is reported as an ingredient of Finimal in the following countries:
International Drug Name Search
Anaromat may be available in the countries listed below.
Anastrozole is reported as an ingredient of Anaromat in the following countries:
International Drug Name Search
Flunitrazepam Actavis may be available in the countries listed below.
Flunitrazepam is reported as an ingredient of Flunitrazepam Actavis in the following countries:
International Drug Name Search
Potassium Aguettant may be available in the countries listed below.
Potassium Chloride is reported as an ingredient of Potassium Aguettant in the following countries:
International Drug Name Search
Predian may be available in the countries listed below.
Gliclazide is reported as an ingredient of Predian in the following countries:
International Drug Name Search
Lomidine may be available in the countries listed below.
Loratadine is reported as an ingredient of Lomidine in the following countries:
International Drug Name Search
Enalapril/HCT-Teva may be available in the countries listed below.
Enalapril maleate (a derivative of Enalapril) is reported as an ingredient of Enalapril/HCT-Teva in the following countries:
Hydrochlorothiazide is reported as an ingredient of Enalapril/HCT-Teva in the following countries:
International Drug Name Search
Lactafal may be available in the countries listed below.
In some countries, this medicine may only be approved for veterinary use.
Bromocriptine mesilate (a derivative of Bromocriptine) is reported as an ingredient of Lactafal in the following countries:
International Drug Name Search
In the US, Paracetamol Sandoz is a member of the drug class miscellaneous analgesics and is used to treat Fever, Muscle Pain, Pain and Sciatica.
Paracetamol is reported as an ingredient of Paracetamol Sandoz in the following countries:
International Drug Name Search
In the US, Tronolane (zinc oxide topical) is a member of the drug class topical anesthetics and is used to treat Anal Itching, Hemorrhoids and Pain.
US matches:
Pramocaine hydrochloride (a derivative of Pramocaine) is reported as an ingredient of Tronolane in the following countries:
International Drug Name Search
Lexotan may be available in the countries listed below.
Bromazepam is reported as an ingredient of Lexotan in the following countries:
International Drug Name Search
Chlorothiazide Sodium (USAN) is known as Chlorothiazide in the US.
International Drug Name Search
Glossary
| USAN | United States Adopted Name |
Gallobeta may be available in the countries listed below.
Gallopamil hydrochloride (a derivative of Gallopamil) is reported as an ingredient of Gallobeta in the following countries:
International Drug Name Search
Mirtazapine Winthrop may be available in the countries listed below.
Mirtazapine is reported as an ingredient of Mirtazapine Winthrop in the following countries:
International Drug Name Search
In some countries, this medicine may only be approved for veterinary use.
In the US, Isoxsuprine (isoxsuprine systemic) is a member of the drug class peripheral vasodilators and is used to treat Cerebrovascular Insufficiency, Coronary Artery Disease and Raynaud's Syndrome.
US matches:
Rec.INN
C04AA01
0000395-28-8
C18-H23-N-O3
301
Vasodilator, peripheric
ß-Sympathomimetic agent
Benzenemethanol, 4-hydroxy-α-[1-[(1-methyl-2-phenoxyethyl)amino]ethyl]-
International Drug Name Search
Glossary
| BAN | British Approved Name |
| BANM | British Approved Name (Modified) |
| DCF | Dénomination Commune Française |
| DCIT | Denominazione Comune Italiana |
| IS | Inofficial Synonym |
| OS | Official Synonym |
| PH | Pharmacopoeia Name |
| Rec.INN | Recommended International Nonproprietary Name (World Health Organization) |
Paroxetin real may be available in the countries listed below.
Paroxetine hydrochloride (a derivative of Paroxetine) is reported as an ingredient of Paroxetin real in the following countries:
International Drug Name Search
Acenocoumarol CF may be available in the countries listed below.
Acenocoumarol is reported as an ingredient of Acenocoumarol CF in the following countries:
International Drug Name Search
Kétazolam may be available in the countries listed below.
Kétazolam (DCF) is also known as Ketazolam (Rec.INN)
International Drug Name Search
Glossary
| DCF | Dénomination Commune Française |
| Rec.INN | Recommended International Nonproprietary Name (World Health Organization) |
Cerutin may be available in the countries listed below.
Ascorbic Acid is reported as an ingredient of Cerutin in the following countries:
Rutoside is reported as an ingredient of Cerutin in the following countries:
International Drug Name Search
In the US, Cafcit (caffeine systemic) is a member of the drug class CNS stimulants and is used to treat Apnea of Prematurity and Hypersomnia.
US matches:
Caffeine is reported as an ingredient of Cafcit in the following countries:
Caffeine citrate (a derivative of Caffeine) is reported as an ingredient of Cafcit in the following countries:
International Drug Name Search
Prestron may be available in the countries listed below.
Chlormadinone 17α-acetate (a derivative of Chlormadinone) is reported as an ingredient of Prestron in the following countries:
International Drug Name Search
Méthylphénobarbital may be available in the countries listed below.
Méthylphénobarbital (DCF) is also known as Methylphenobarbital (Rec.INN)
International Drug Name Search
Glossary
| DCF | Dénomination Commune Française |
| Rec.INN | Recommended International Nonproprietary Name (World Health Organization) |
In the US, Fenoprofen (fenoprofen systemic) is a member of the drug class nonsteroidal anti-inflammatory agents and is used to treat Gout - Acute, Osteoarthritis, Pain and Rheumatoid Arthritis.
US matches:
Rec.INN
M01AE04
0031879-05-7
C15-H14-O3
242
Analgesic, antipyretic and anti-inflammatory agent
Non-steroidal anti-inflammatory drug, NSAID
Benzeneacetic acid, α-methyl-3-phenoxy-, (±)-
International Drug Name Search
Glossary
| BAN | British Approved Name |
| BANM | British Approved Name (Modified) |
| DCF | Dénomination Commune Française |
| DCIT | Denominazione Comune Italiana |
| IS | Inofficial Synonym |
| JAN | Japanese Accepted Name |
| OS | Official Synonym |
| PH | Pharmacopoeia Name |
| Rec.INN | Recommended International Nonproprietary Name (World Health Organization) |
| USAN | United States Adopted Name |
Remoxin may be available in the countries listed below.
Amoxicillin is reported as an ingredient of Remoxin in the following countries:
International Drug Name Search
Calf Cura 3 may be available in the countries listed below.
In some countries, this medicine may only be approved for veterinary use.
Sulfadiazine is reported as an ingredient of Calf Cura 3 in the following countries:
Trimethoprim is reported as an ingredient of Calf Cura 3 in the following countries:
International Drug Name Search
Analgine Sterop may be available in the countries listed below.
Metamizole sodium anhydrous (a derivative of Metamizole) is reported as an ingredient of Analgine Sterop in the following countries:
International Drug Name Search
Grisovin may be available in the countries listed below.
In some countries, this medicine may only be approved for veterinary use.
Griseofulvin is reported as an ingredient of Grisovin in the following countries:
International Drug Name Search
Citalopram-Isis may be available in the countries listed below.
Citalopram hydrobromide (a derivative of Citalopram) is reported as an ingredient of Citalopram-Isis in the following countries:
International Drug Name Search
Mirtecaina may be available in the countries listed below.
Mirtecaina (DCIT) is also known as Myrtecaine (Rec.INN)
International Drug Name Search
Glossary
| DCIT | Denominazione Comune Italiana |
| Rec.INN | Recommended International Nonproprietary Name (World Health Organization) |
ASS AL may be available in the countries listed below.
Acetylsalicylic Acid is reported as an ingredient of ASS AL in the following countries:
International Drug Name Search
Euipnos may be available in the countries listed below.
Temazepam is reported as an ingredient of Euipnos in the following countries:
International Drug Name Search
Efaxil may be available in the countries listed below.
Venlafaxine is reported as an ingredient of Efaxil in the following countries:
International Drug Name Search
Piperacillin Hexal may be available in the countries listed below.
Piperacillin sodium salt (a derivative of Piperacillin) is reported as an ingredient of Piperacillin Hexal in the following countries:
International Drug Name Search
Gastrorapid may be available in the countries listed below.
Magaldrate is reported as an ingredient of Gastrorapid in the following countries:
Simeticone is reported as an ingredient of Gastrorapid in the following countries:
International Drug Name Search
Xylometazolinehydrochloride Katwijk may be available in the countries listed below.
Xylometazoline hydrochloride (a derivative of Xylometazoline) is reported as an ingredient of Xylometazolinehydrochloride Katwijk in the following countries:
International Drug Name Search
Atenolol Normon may be available in the countries listed below.
Atenolol is reported as an ingredient of Atenolol Normon in the following countries:
International Drug Name Search
Amilo may be available in the countries listed below.
Amlodipine is reported as an ingredient of Amilo in the following countries:
International Drug Name Search
Aminocaproic Acid is reported as an ingredient of Aminocaproic in the following countries:
International Drug Name Search
Retrovir 10 mg/ml IV Concentrate for Solution for Infusion
Vials containing zidovudine 200 mg in 20ml solution (10 mg zidovudine/ml)
For a full list of excipients, see section 6.1.
Concentrate for solution for infusion (Sterile concentrate)
Retrovir IV for Infusion is a clear, nearly colourless, sterile aqueous solution with a pH of approximately 5.5.
Retrovir IV for Infusion is indicated for the short-term management of serious manifestations of Human Immunodeficiency Virus (HIV) infection in patients with Acquired Immune Deficiency Syndrome (AIDS) who are unable to take Retrovir oral formulations. If at all possible Retrovir IV should not be used as monotherapy for this indication (see section 5.1).
Retrovir chemoprophylaxis, is indicated for use in HIV-positive pregnant women (over 14 weeks of gestation) for prevention of maternal-foetal HIV transmission and for primary prophylaxis of HIV infection in newborn infants. Retrovir IV should only be used when oral treatment is not possible (except during labour and delivery – see section 4.2).
Retrovir should be prescribed by physicians who are experienced in the treatment of HIV infection.
The required dose of Retrovir IV for Infusion must be administered by slow intravenous infusion of the diluted product over a one-hour period.
Retrovir IV for Infusion must NOT be given intramuscularly.
Dilution: Retrovir IV for Infusion must be diluted prior to administration (see section 6.6).
Dosage in adults: A dose for Retrovir IV for Infusion of 1 or 2 mg zidovudine/kg bodyweight every 4 hours provides similar exposure (AUC) to an oral dose of 1.5 or 3.0 mg zidovudine/kg every 4 hours (600 or 1200 mg/day for a 70 kg patient). The current recommended oral dose of Retrovir is 250 or 300 mg twice daily. This current dose is used as part of a multi-drug treatment regimen.
Patients should receive Retrovir IV for Infusion only until oral therapy can be administered.
Dosage in children: Limited data are available on the use of Retrovir IV for Infusion in children. A range of intravenous dosages between 80-160 mg/m2 every 6 hours (320-640 mg/ m2/day) have been used. Exposure following the 120 mg/ m2 dose every 6 hours approximately corresponds to an oral dose of 180 mg/m2 every 6 hours. An oral dose of Retrovir of 360 to 480 mg/m2 per day approximately corresponds to an intravenous dose of 240-320 mg/m2/day.
Dosage in the prevention of maternal-foetal transmission: Pregnant women (over 14 weeks of gestation) should be given 500 mg/day orally (100 mg five times per day) until the beginning of labour. During labour and delivery Retrovir should be administered intravenously at 2 mg/kg bodyweight given over one hour followed by a continuous intravenous infusion at 1 mg/kg/h until the umbilical cord is clamped.
The newborn infants should be given 2 mg/kg bodyweight orally every 6 hours starting within 12 hours after birth and continuing until 6 weeks-old (e.g. a 3 kg neonate would require a 0.6 ml dose of oral solution every 6 hours). Infants unable to receive oral dosing should be given Retrovir intravenously at 1.5 mg/kg bodyweight infused over 30 minutes every 6 hours.
In case of planned caesarean, the infusion should be started 4 hours before the operation. In the event of a false labour, the Retrovir infusion should be stopped and oral dosing restarted.
Dosage adjustments in patients with haematological adverse reactions: Substitution of zidovudine should be considered in patients whose haemoglobin level or neutrophil count fall to clinically significant levels. Other potential causes of anaemia or neutropenia should be excluded. Retrovir dose reduction or interruption should be considered in the absence of alternative treatments (see sections 4.3 and 4.4).
Dosage in the elderly: Zidovudine pharmacokinetics have not been studied in patients over 65 years of age and no specific data are available. However, since special care is advised in this age group due to age-associated changes such as the decrease in renal function and alterations in haematological parameters, appropriate monitoring of patients before and during use of Retrovir is advised.
Dosage in renal impairment: In patients with severe renal impairment, the recommended IV dosage is 1 mg/kg 3-4 times daily. This is equivalent to the current recommended oral daily dosage for this patient group of 300 – 400 mg allowing for oral bioavailability of 60-70%. Haematological parameters and clinical response may influence the need for subsequent dosage adjustment. For patients with end-stage renal disease maintained on haemodialysis or peritoneal dialysis, the recommended dose is 100 mg every 6-8 hrs (300 mg – 400 mg daily) (see section 5.2).
Dosage in hepatic impairment: Data in patients with cirrhosis suggest that accumulation of zidovudine may occur in patients with hepatic impairment because of decreased glucuronidation. Dosage reductions may be necessary but, due to the large variability in zidovudine exposures in patients with moderate to severe liver disease, precise recommendations cannot be made. If monitoring of plasma zidovudine levels is not feasible, physicians will need to monitor for signs of intolerance, such as the development of haematological adverse reactions (anaemia, leucopenia, neutropenia) and reduce the dose and/or increase the interval between doses as appropriate (see section 4.4).
Retrovir IV for Infusion is contra-indicated in patients known to be hypersensitive to zidovudine, or to any of the excipients.
Retrovir IV for infusion should not be given to patients with abnormally low neutrophil counts (less than 0.75 x 109/litre) or abnormally low haemoglobin levels (less than 7.5 g/decilitre or 4.65 mmol/litre).
Retrovir is contra-indicated in newborn infants with hyperbilirubinaemia requiring treatment other than phototherapy, or with increased transaminase levels of over five times the upper limit of normal.
Retrovir is not a cure for HIV infection or AIDS. Patients receiving Retrovir or any other antiretroviral therapy may continue to develop opportunistic infections and other complications of HIV infection.
The concomitant use of rifampicin stavudine with zidovudine should be avoided (see section 4.5).
Haematological Adverse Reactions: Anaemia (usually not observed before six weeks of Retrovir therapy but occasionally occurring earlier), neutropenia (usually not observed before four weeks' therapy but sometimes occurring earlier) and leucopenia (usually secondary to neutropenia) can be expected to occur in patients receiving Retrovir IV for Infusion; These occurred more frequently at high dosages (1200-1500 mg/day orally) and in patients with poor bone marrow reserve prior to treatment, particularly with advanced HIV disease (see section 4.8).
Haematological parameters should be carefully monitored. It is recommended that blood tests are performed at least weekly in patients receiving Retrovir IV for Infusion.
If the haemoglobin level falls to between 7.5 g/dl (4.65 mmol/l) and 9 g/dl (5.59 mmol/l) or the neutrophil count falls to between 0.75 x 109/l and 1.0 x 109/l, the daily dosage may be reduced until there is evidence of marrow recovery; alternatively, recovery may be enhanced by brief (2-4 weeks) interruption of Retrovir therapy. Marrow recovery is usually observed within 2 weeks after which time Retrovir therapy at a reduced dosage may be reinstituted. Data on the use of Retrovir for periods in excess of 2 weeks are limited. In patients with significant anaemia, dosage adjustments do not necessarily eliminate the need for transfusions (see section 4.3).
Lactic acidosis: lactic acidosis usually associated with hepatomegaly and hepatic steatosis has been reported with the use of nucleoside analogues. Early symptoms (symptomatic hyperlactatemia) include benign digestive symptoms (nausea, vomiting and abdominal pain), non-specific malaise, loss of appetite, weight loss, respiratory symptoms (rapid and/or deep breathing) or neurological symptoms (including motor weakness).
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Mitochondrial toxicity: Nucleoside and nucleotide analogues have been demonstrated in vitro and in vivo to cause a variable degree of mitochondrial damage. There have been reports of mitochondrial dysfunction in HIV-negative infants exposed in utero and/or post-natally to nucleoside analogues. The main adverse events reported are haematological disorders (anaemia, neutropenia), metabolic disorders (hyperlactataemia, hyperlipasaemia). These events are often transitory. Some late-onset neurological disorders have been reported (hypertonia, convulsion, abnormal behaviour). Whether the neurological disorders are transient or permanent is currently unknown. Any child exposed in utero to nucleoside and nucleotide analogues, even HIV-negative children, should have clinical and laboratory follow-up and should be fully investigated for possible mitochondrial dysfunction in case of relevant signs or symptoms. These findings do not affect current recommendations to use antiretroviral therapy in pregnant women to prevent vertical transmission of HIV.
Lipodystrophy: Combination antiretroviral therapy has been associated with the redistribution of body fat (lipodystrophy) in HIV patients. The long-term consequences of these events are currently unknown. Knowledge about the mechanism is incomplete. A connection between visceral lipomatosis and PIs and lipoatrophy and NRTIs has been hypothesised. A higher risk of lipodystrophy has been associated with individual factors such as older age, and with drug related factors such as longer duration of antiretroviral treatment and associated metabolic disturbances. Clinical examination should include evaluation for physical signs of fat redistribution. Consideration should be given to the measurement of fasting serum lipids and blood glucose. Lipid disorders should be managed as clinically appropriate (see section 4.8).
Liver disease: Zidovudine clearance in patients with mild hepatic impairment without cirrhosis [Child-Pugh scores of 5-6] is similar to that seen in healthy subjects, therefore no zidovudine dose adjustment is required. In patients with moderate to severe liver disease [Child-Pugh scores of 7-15], specific dosage recommendations cannot be made due to the large variability in zidovudine exposure observed, therefore zidovudine use in this group of patients is not recommended.
Patients with chronic hepatitis B or C and treated with combination antiretroviral therapy are at an increased risk of severe and potentially fatal hepatic adverse events. In case of concomitant antiviral therapy for hepatitis B or C, please also refer to the relevant product information for these medicinal products.
Patients with pre-existing liver dysfunction, including chronic active hepatitis, have an increased frequency of liver function abnormalities during combination antiretroviral therapy and should be monitored according to standard practice. If there is evidence of worsening liver disease in such patients, interruption or discontinuation of treatment must be considered (see section 4.2).
Immune Reactivation Syndrome: In HIV-infected patients with severe immune deficiency at the time of institution of combination antiretroviral therapy (CART), an inflammatory reaction to asymptomatic or residual opportunistic pathogens may arise and cause serious clinical conditions, or aggravation of symptoms. Typically, such reactions have been observed within the first few weeks or months of initiation of CART. Relevant examples are cytomegalovirus retinitis, generalized and/or focal mycobacterial infections and Pneumocystis carinii pneumonia. Any inflammatory symptoms should be evaluated and treatment instituted when necessary.
Patients should be cautioned about the concomitant use of self-administered medications (see section 4.5).
Patients should be advised that Retrovir therapy has not been proven to prevent the transmission of HIV to others through sexual contact or contamination with blood.
Osteonecrosis: Although the etiology is considered to be multifactorial (including corticosteroid use, alcohol consumption, severe immunosuppression, higher body mass index), cases of osteonecrosis have been reported particularly in patients with advanced HIV-disease and/or long-term exposure to combination antiretroviral therapy (CART). Patients should be advised to seek medical advice if they experience joint aches and pain, joint stiffness or difficulty in movement.
Patients co-infected with hepatitis C virus: The concomitant use of ribavirin with zidovudine is not recommended due to an increased risk of anaemia (see section 4.5).
Limited data suggests that co-administration of zidovudine with rifampicin decreases the AUC (area under the plasma concentration curve) of zidovudine by 48% ± 34%. This may result in a partial loss or total loss of efficacy of zidovudine. The concomitant use of rifampicin with zidovudine should be avoided (see section 4.4).
Zidovudine in combination with stavudine is antagonistic in vitro. The concomitant use of stavudine with zidovudine should be avoided (see section 4.4).
Probenecid increases the AUC of zidovudine by 106% (range 100 to 170%). Patients receiving both drugs should be closely monitored for haematological toxicity.
A modest increase in Cmax (28%) was observed for zidovudine when administered with lamivudine, however overall exposure (AUC) was not significantly altered. Zidovudine has no effect on the pharmacokinetics of lamivudine.
Phenytoin blood levels have been reported to be low in some patients receiving Retrovir, while in one patient a high level was noted. These observations suggest that phenytoin levels should be carefully monitored in patients receiving both drugs.
Atovaquone: zidovudine does not appear to affect the pharmacokinetics of atovaquone. However, pharmacokinetic data have shown that atovaquone appears to decrease the rate of metabolism of zidovudine to its glucuronide metabolite (steady state AUC of zidovudine was increased by 33% and peak plasma concentration of the glucuronide was decreased by 19%). At zidovudine dosages of 500 or 600 mg/day it would seem unlikely that a three week, concomitant course of atovaquone for the treatment of acute PCP would result in an increased incidence of adverse reactions attributable to higher plasma concentrations of zidovudine. Extra care should be taken in monitoring patients receiving prolonged atovaquone therapy.
Valproic acid, fluconazole or methadone when co-administered with zidovudine have been shown to increase the AUC with a corresponding decrease in its clearance. As only limited data are available the clinical significance of these findings is unclear but if zidovudine is used concurrently with either valproic acid, fluconazole or methadone, patients should be monitored closely for potential toxicity of zidovudine.
Exacerbation of anaemia due to ribavirin has been reported when zidovudine is part of the regimen used to treat HIV although the exact mechanism remains to be elucidated. The concomitant use of ribavirin with zidovudine is not recommended due to an increased risk of anaemia (see section 4.4). Consideration should be given to replacing zidovudine in a combination ART regimen if this is already established. This would be particularly important in patients with a known history of zidovudine induced anaemia.
Concomitant treatment, especially acute therapy, with potentially nephrotoxic or myelosuppressive drugs (e.g. systemic pentamidine, dapsone, pyrimethamine, co-trimoxazole, amphotericin, flucytosine, ganciclovir, interferon, vincristine, vinblastine and doxorubicin) may also increase the risk of adverse reactions to zidovudine. If concomitant therapy with any of these drugs is necessary then extra care should be taken in monitoring renal function and haematological parameters and, if required, the dosage of one or more agents should be reduced.
Limited data from clinical trials do not indicate a significantly increased risk of adverse reactions to zidovudine with cotrimoxazole, aerosolised pentamidine, pyrimethamine and aciclovir at doses used in prophylaxis.
Pregnancy:
The use of Retrovir in pregnant women over 14 weeks of gestation, with subsequent treatment of their newborn infants, has been shown to significantly reduce the rate of maternal-foetal transmission of HIV based on viral cultures in infants.
The results from the pivotal U.S. placebo-controlled study indicated that Retrovir reduced maternal-foetal transmission by approximately 70%. In this study, pregnant women had CD4 cell counts of 200 to 1818/mm3 (median in treated group 560/mm3) and began treatment therapy between weeks 14 and 34 of gestation and had no clinical indications for Retrovir therapy; their newborn infants received Retrovir until 6-weeks old.
A decision to reduce the risk of maternal transmission of HIV should be based on the balance of potential benefits and potential risk. Pregnant women considering the use of Retrovir during pregnancy for prevention of HIV transmission to their infants should be advised that transmission may still occur in some cases despite therapy.
The efficacy of zidovudine to reduce the maternal-foetal transmission in women with previously prolonged treatment with zidovudine or other antiretroviral agents or women infected with HIV strains with reduced sensitivity to zidovudine is unknown.
It is unknown whether there are any long-term consequences of in utero and infant exposure to Retrovir.
Based on the animal carcinogenicity/mutagenicity findings a carcinogenic risk to humans cannot be excluded (see section 5.3). The relevance of these findings to both infected and uninfected infants exposed to Retrovir is unknown. However, pregnant women considering using Retrovir during pregnancy should be made aware of these findings.
A large amount of data on pregnant women (more than 3000 exposed outcomes) indicate no malformative nor feto/neonatal toxitcity. Retrovir can be used during pregnancy if clinically needed. Retrovir should only be used prior to the 14th week of gestation when the potential benefit to the mother and foetus outweigh the risks. Studies in pregnant rats and rabbits given zidovudine orally at dosage levels up to 450 and 500 mg/kg/day respectively during the major period of organogenesis have revealed no evidence of teratogenicity. There was, however, a statistically significant increase in foetal resorptions in rats given 150 to 450 mg/kg/day and in rabbits given 500 mg/kg/day.
A separate study, reported subsequently, found that rats given a dosage of 3000 mg/kg/day, which is very near the oral median lethal dose (3683 mg/kg), caused marked maternal toxicity and an increase in the incidence of foetal malformations. No evidence of teratogenicity was observed in this study at the lower dosages tested (600 mg/kg/day or less).
Fertility:
Zidovudine did not impair male or female fertility in rats given oral doses of up to 450 mg/kg/day. There are no data on the effect of Retrovir on human female fertility. In men, Retrovir has not been shown to affect sperm count, morphology or motility.
Lactation:
Health experts recommend that women infected with HIV do not breast feed their infants in order to avoid the transmission of HIV. After administration of a single dose of 200 mg zidovudine to HIV-infected women, the mean concentration of zidovudine was similar in human milk and serum. Therefore, since the drug and the virus pass into breast milk it is recommended that mothers taking Retrovir do not breast feed their infants.
Retrovir IV for Infusion is generally used in an in-patient hospital population and information on ability to drive and use machinery is not usually relevant. There have been no studies to investigate the effect of Retrovir on driving performance or the ability to operate machinery. Furthermore, a detrimental effect on such activities cannot be predicted from the pharmacology of the drug. Nevertheless, the clinical status of the patient and the adverse reaction profile of Retrovir should be borne in mind when considering the patient's ability to drive or operate machinery.
The adverse reaction profile appears similar for adults and children. The most serious adverse reactions include anaemia (which may require transfusions), neutropenia and leucopenia. These occurred more frequently at higher dosages (1200-1500 mg/day) and in patients with advanced HIV disease (especially when there is poor bone marrow reserve prior to treatment), and particularly in patients with CD4 cell counts less than 100/mm3. Dosage reduction or cessation of therapy may become necessary (see section 4.4).
The incidence of neutropenia was also increased in those patients whose neutrophil counts, haemoglobin levels and serum vitamin B12 levels were low at the start of Retrovir therapy.
The following events have been reported in patients treated with Retrovir.
The adverse events considered at least possibly related to the treatment (adverse drug reactions, ADR) are listed below by body system, organ class and absolute frequency. Frequencies are defined as Very common (greater than 10%), Common (1 - 10%), Uncommon (0.1-1%), Rare (0.01-0.1%) and Very rare (less than 0.01%).
Blood and lymphatic system disorders
Common: Anaemia, neutropenia and leucopenia
Uncommon: Pancytopenia with bone marrow hypoplasia, thrombocytopenia
Rare: Pure red cell aplasia
Very rare: Aplastic anaemia
Metabolism and nutrition disorders
Rare: Lactic acidosis in the absence of hypoxaemia, anorexia
Psychiatric disorders
Rare: Anxiety and depression
Nervous system disorders
Very common: Headache
Common: Dizziness
Rare:Convulsions, loss of mental acuity, insomnia, paraesthesia, somnolence
Cardiac disorders
Rare: Cardiomyopathy
Respiratory, thoracic and mediastinal disorders
Uncommon: Dyspnoea
Rare: Cough
Gastrointestinal disorders
Very common: Nausea
Common: Vomiting, diarrhoea and abdominal pain
Uncommon: Flatulence
Rare: Oral mucosa pigmentation, taste disturbance and dyspepsia. Pancreatitis.
Hepatobiliary disorders
Common: Raised blood levels of liver enzymes and bilirubin
Rare: Liver disorders such as severe hepatomegaly with steatosis
Skin and subcutaneous tissue disorders
Uncommon: Rash and pruritis
Rare: Urticaria, nail and skin pigmentation, and sweating
Musculoskeletal and connective tissue disorders
Common: Myalgia
Uncommon: Myopathy
Renal and urinary disorders
Rare: Urinary frequency
Reproductive system and breast disorders
Rare: Gynaecomastia
General disorders and administration site disorders
Common: Malaise
Uncommon: Asthenia, fever, and generalised pain
Rare: Chest pain and influenza-like syndrome, chills
Experience with Retrovir IV for Infusion treatment for periods in excess of two weeks is limited, although some patients have received treatment for up to 12 weeks. The most frequent adverse reactions were anaemia, neutropenia and leucopenia. Local reactions were infrequent.
The available data from studies of Retrovir Oral Formulations indicate that the incidence of nausea and other frequently reported clinical adverse reactions consistently decreased over time during the first few weeks of therapy with Retrovir.
Adverse reactions with Retrovir for the prevention of maternal-foetal transmission:
In a placebo-controlled trial, overall clinical adverse reactions and laboratory test abnormalities were similar for women in the Retrovir and placebo groups. However, there was a trend for mild and moderate anaemia to be seen more commonly prior to delivery in the zidovudine treated women.
In the same trial, haemoglobin concentrations in infants exposed to Retrovir for this indication were marginally lower than in infants in the placebo group, but transfusion was not required. Anaemia resolved within 6 weeks after completion of Retrovir therapy. Other clinical adverse reactions and laboratory test abnormalities were similar in the Retrovir and placebo groups. It is unknown whether there are any long-term consequences of in utero and infant exposure to Retrovir.
Within each frequency grouping, undesirable effects are presented in order of decreasing seriousness.
Cases of lactic acidosis, sometimes fatal, usually associated with severe hepatomegaly and hepatic steatosis, have been reported with the use of nucleoside analogues (see section 4.4).
Combination antiretroviral therapy has been associated with redistribution of body fat (lipodystrophy) in HIV patients including the loss of peripheral and facial subcutaneous fat, increased intra-abdominal and visceral fat, breast hypertrophy and dorsocervical fat accumulation (buffalo hump).
Combination antiretroviral therapy has been associated with metabolic abnormalities such as hypertriglyceridaemia, hypercholesterolaemia, insulin resistance, hyperglycaemia and hyperlactataemia (see section 4.4).
In HIV-infected patients with severe immune deficiency at the time of initiation of combination antiretroviral therapy (CART), an inflammatory reaction to asymptomatic or residual opportunistic infections may arise (see section 4.4).
Cases of osteonecrosis have been reported, particularly in patients with generally acknowledged risk factors, advanced HIV disease or long-term exposure to combination antiretroviral therapy (CART). The frequency of this is unknown (see section 4.4).
Symptoms and signs:
Dosages as high as 7.5 mg/kg by infusion every four hours for two weeks have been administered to five patients. One patient experienced an anxiety reaction while the other four had no untoward effects.
No specific symptoms or signs have been identified following acute oral overdose with zidovudine apart from those listed as undesirable effects such as fatigue, headache, vomiting, and occasional reports of haematological disturbances. Following a report where a patient took an unspecified quantity of zidovudine with serum levels consistent with an overdose of greater than 17 g there were no short term clinical, biochemical or haematological sequelae identified.
Treatment:
Patients should be observed closely for evidence of toxicity (see section 4.8) and given the necessary supportive therapy.
Haemodialysis and peritoneal dialysis appear to have a limited effect on elimination of zidovudine but enhance the elimination of the glucuronide metabolite.
Pharmacotherapeutic group: nucleoside analogue , ATC code: J05A F01
Mode of action:
Zidovudine is an antiviral agent which is highly active in vitro against retroviruses including the Human Immunodeficiency Virus (HIV).
Zidovudine is phosphorylated in both infected and uninfected cells to the monophosphate (MP) derivative by cellular thymidine kinase. Subsequent phosphorylation of zidovudine-MP to the diphosphate (DP), and then the triphosphate (TP) derivative is catalysed by cellular thymidylate kinase and non-specific kinases respectively. Zidovudine-TP acts as an inhibitor of and substrate for the viral reverse transcriptase. The formation of further proviral DNA is blocked by incorporation of zidovudine-MP into the chain and subsequent chain termination. Competition by zidovudine-TP for HIV reverse transcriptase is approximately 100-fold greater than for cellular DNA polymerase alpha.
Clinical virology:
The relationships between in vitro susceptibility of HIV to zidovudine and clinical response to therapy remain under investigation. In vitro sensitivity testing has not been standardised and results may therefore vary according to methodological factors. Reduced in vitro sensitivity to zidovudine has been reported for HIV isolates from patients who have received prolonged courses of Retrovir therapy. The available information indicates that for early HIV disease, the frequency and degree of reduction of in vitro sensitivity is notably less than for advanced disease.
The reduction of sensitivity with the emergence of zidovudine resistant strains limits the usefulness of zidovudine monotherapy clinically. In clinical studies, clinical end-point data indicate that zidovudine, particularly in combination with lamivudine, and also with didanosine or zalcitabine results in a significant reduction in the risk of disease progression and mortality. The use of a protease inhibitor in a combination of zidovudine and lamivudine, has been shown to confer additional benefit in delaying disease progression, and improving survival compared to the double combination on its own.
The anti-viral effectiveness in vitro of combinations of anti-retroviral agents are being investigated. Clinical and in vitro studies of zidovudine in combination with lamivudine indicate that zidovudine-resistant virus isolates can become zidovudine sensitive when they simultaneously acquire resistance to lamivudine. Furthermore there is clinical evidence that zidovudine plus lamivudine delays the emergence of zidovudine resistance in anti-retroviral naive patients.
In some in vitro studies zidovudine has been shown to act additively or synergistically with a number of anti-HIV agents, such as lamivudine, didanosine, and interferon-alpha, inhibiting the replication of HIV in cell culture. However, in vitro studieswith triple combinations of nucleoside analogues or two nucleoside analogues and a protease inhibitor have been shown to bemore effective in inhibiting HIV-1 induced cytopathic effects than one or two drug combinations.
Resistance to thymidine analogues (of which zidovudine is one) is well characterised and is conferred by the stepwise accumulation of up to six specific mutations in the HIV reverse transcriptase at codons 41, 67, 70, 210, 215 and 219. Viruses acquire phenotypic resistance to thymidine analogues through the combination of mutations at codons 41 and 215 or by the accumulation of at least four of the six mutations. These thymidine analogue mutations alone do not cause high-level cross-resistance to any of the other nucleosides, allowing for the subsequent use of any of the other approved reverse transcriptase inhibitors.
Two patterns of multi-drug resistance mutations, the first characterised by mutations in the HIV reverse transcriptase at codons 62, 75, 77, 116 and 151 and the second involving a T69S mutation plus a 6-base pair insert at the same position, result in phenotypic resistance to AZT as well as to the other approved nucleoside reverse transcriptase inhibitors. Either of these two patterns of multinucleoside resistance mutations severely limits future therapeutic options.
In the US ACTGO76 trial, Retrovir was shown to be effective in reducing the rate of maternal-foetal transmission of HIV-1 (23% infection rate for placebo versus 8% for zidovudine) when administered (100 mg five times a day) to HIV-positive pregnant women (from week 14-34 of pregnancy) and their newborn infants (2 mg/kg every 6 hours) until 6 weeks of age. In the shorter duration 1998 Thailand CDC study, use of oral Retrovir therapy only (300 mg twice daily), from week 36 of pregnancy until delivery, also reduced the rate of maternal-foetal transmission of HIV (19% infection rate for placebo versus 9% for zidovudine). These data, and data from a published study comparing zidovudine regimens to prevent maternal-foetal HIV transmission have shown that short maternal treatments (from week 36 of pregnancy) are less efficacious than longer maternal treatments (from week 14-34 of pregnancy) in the reduction of perinatal HIV transmission.
Adults:
Absorption:
Dose-independent kinetics were observed in patients receiving one-hour infusions of 1 to 5 mg/kg 3 to 6 times daily. Mean steady state peak (Cssmax) and trough (Cssmin) plasma concentrations in adults following a one-hour infusion of 2.5 mg/kg every 4 hours were 4.0 and 0.4 µM, respectively (or 1.1 and 0.1 µg/ml).
Distribution:
The mean terminal plasma half-life was 1.1 hours, the mean total body clearance was 27.1 ml/min/kg and the apparent volume of distribution was 1.6 litres/kg.
In adults, the average cerebrospinal fluid/plasma zidovudine concentration ratio 2 to 4 hours after chronic intermittent oral dosing was found to be approximately 0.5. Data indicate that zidovudine crosses the placenta and is found in amniotic fluid and foetal blood. Zidovudine has also been detected in semen and milk.
Plasma protein binding is relatively low (34 to 38%) and drug interactions involving binding site displacement are not anticipated.
Metabolism:
Zidovudine is primarily eliminated by hepatic conjugation to an inactive glucoronidated metabolite. The 5'-glucuronide of zidovudine is the major metabolite in both plasma and urine, accounting for approximately 50-80% of the administered dose eliminated by renal excretion. 3'-amino-3'-deoxythymidine (AMT) has been identified as a metabolite of zidovudine following intravenous dosing.
Excretion:
Renal clearance of zidovudine greatly exceeds creatinine clearance, indicating that significant tubular secretion takes place.
Paediatrics:
Absorption:
In children over the age of 5-6 months, the pharmacokinetic profile of zidovudine is similar to that in adults. Cssmax levels were 1.46 µg/ml following an intravenous dose of 80 mg zidovudine/m2 body surface area, 2.26 µg/ml following 120 mg/m2 and 2.96 µg/ml following 160 mg/m2.
Distribution:
With intravenous dosing, the mean terminal plasma half-life and total body clearance were 1.5 hours and 30.9 ml/min/kg respectively.
In children the mean cerebrospinal fluid/plasma zidovudine concentration ratio ranged from 0.52-0.85, as determined during oral therapy 0.5 to 4 hours after dosing and was 0.87 as determined during intravenous therapy 1-5 hours after a 1 hour infusion. During continuous intravenous infusion, the mean steady-state cerebrospinal fluid/plasma concentration ratio was 0.24.
Metabolism:
The major metabolite is 5'-glucuronide. After intravenous dosing, 29% of the dose was recovered unchanged in the urine and 45% excreted as the glucuronide.
Excretion:
Renal clearance of zidovudine greatly exceeds creatinine clearance indicating that significant tubular secretion takes place.
The data available on the pharmacokinetics in neonates and young infants indicate that glucuronidation of zidovudine is reduced with a consequent increase in bioavailability, reduction in clearance and longer half-life in infants less than 14 days old but thereafter the pharmacokinetics appear similar to those reported in adults.
Pregnancy:
The pharmacokinetics of zidovudine has been investigated in a study of eight women during the third trimester of pregnancy. As pregnancy progressed, there was no evidence of drug accumulation. The pharmacokinetics of zidovudine was similar to that of non-pregnant adults. Consistent with passive transmission of the drug across the placenta, zidovudine concentrations in infant plasma at birth were essentially equal to those in maternal plasma at delivery.
Elderly:
No specific data are available on the pharmacokinetics of zidovudine in the elderly.
Renal impairment:
Compared to healthy subjects, patients with advanced renal failure have a 50% higher peak plasma concentration after oral administration. Systemic exposure (measured as area under the zidovudine concentration time curve) is increased 100%; the half-life is not significantly altered. In renal failure there is substantial accumulation of the major glucuronide metabolite but this does not appear to cause toxicity. Haemodialysis and peritoneal dialysis have no significant effect on zidovudine elimination whereas elimination of the inactive glucuronide metabolite is increased. (see section 4.2).
Hepatic impairment:
There are limited data concerning the pharmacokinetics of zidovudine in patients with hepatic impairment (see section 4.2). No specific data are available on the pharmacokinetics of zidovudine in the elderly.
Mutagenicity:
No evidence of mutagenicity was observed in the Ames test. However, zidovudine was weakly mutagenic in a mouse lymphoma cell assay and was positive in an in vitro cell transformation assay. Clastogenic effects (chromosome damage) were observed in an in vitro study in human lymphocytes and in in vivo oral repeat dose micronucleus studies in rats and mice. An in vivo cytogenetic study in rats did not show chromosomal damage. A study of the peripheral blood lymphocytes of eleven AIDS patients showed a higher chromosome breakage frequency in those who had received Retrovir than in those who had not. A pilot study has demonstrated that zidovudine is incorporated into leukocyte nuclear DNA of adults, including pregnant women, taking zidovudine as treatment for HIV-1 infection, or for the prevention of mother to child viral transmission. Zidovudine was also incorporated into DNA from cord blood leukocytes of infants from zidovudine-treated mothers. A transplacental genotoxicity study conducted in monkeys compared zidovudine alone with the combination of zidovudine and lamivudine at human-equivalent exposures. The study demonstrated that foetuses exposed in utero to the combination sustained a higher level of nucleoside analogue-DNA incorporation into multiple foetal organs, and showed evidence of more telomere shortening than in those exposed to zidovudine alone. The clinical significance of these findings is unknown.
Carcinogenicity:
In oral carcinogenicity studies with zidovudine in mice and rats, late appearing vaginal epithelial tumours were observed. A subsequent intravaginal carcinogenicity study confirmed the hypothesis that the vaginal tumours were the result of long term local exposure of the rodent vaginal epithelium to high concentrations of unmetabolised zidovudine in urine. There were no other drug-related tumours observed in either sex of either species.
In addition, two transplacental carcinogenicity studies have been conducted in mice. One study, by the US National Cancer Institute, administered zidovudine at maximum tolerated doses to pregnant mice from day 12 to 18 of gestation. One year post-natally, there was an increase in the incidence of tumours in the lung, liver and female reproductive tract of offspring exposed to the highest dose level (420 mg/kg term body weight).
In a second study, mice were administered zidovudine at doses up to 40 mg/kg for 24 months, with exposure beginning prenatally on gestation day 10. Treatment related findings were limited to late-occurring vaginal epithelial tumours, which were seen with a similar incidence and time of onset as in the standard oral carcinogenicity study. The second study thus provided no evidence that zidovudine acts as a transplacental carcinogen.
It is concluded that the transplacental carcinogenicity data from the first study represents a hypothetical risk, whereas the reduction in risk of maternal transfection of HIV to the uninfected child by the use of zidovudine in pregnancy has been well proven.
Hydrochloric acid (pH for adjustment)
Sodium hydroxide (pH for adjustment)
Water for injection
In the absence of compatibility studies, this medicinal product must not be mixed with other medicinal products
3 years. (Refer to Section 6.6 for shelf life after opening)
Do not store above 30°C.
Keep the vial in the outer carton.
Type I glass vial (amber, neutral glass) with rubber stopper containing 20ml sterile concentrate, available in pack sizes of 5.
Retrovir I.V. for Infusion must be diluted prior to administration. Since no antimicrobial preservative is included, dilution must be carried out under full aseptic conditions, preferably immediately prior to administration, and any unused portion of the vial should be discarded.
The required dose should be added to and mixed with Glucose Intravenous Infusion 5% w/v to give a final zidovudine concentration of either 2 mg/ml or 4 mg/ml. These dilutions are chemically and physically stable for up to 48 hours at both 5°C and 25°C. Should any visible turbidity appear in the product either before or after dilution or during infusion, the preparation should be discarded.
Any unused product or waste material should be disposed of in accordance with local requirements.
ViiV Healthcare UK Limited
980 Great West Road
Brentford
Middlesex
TW8 9GS
PL 35728/0005
Date of first authorisation: 20 April 1993
Date of last renewal: 19 July 2011
06 January 2012
