Active Substance: Mercaptopurine.
Overview
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This medicine contains an important and useful components, as it consists of
Mercaptopurineis available in the market in concentration
Mercaptopurine
Hepatic or renal dysfunction; monitor hepatic function periodically. Mercaptopurine is potentially carcinogenic. Thiopurine S-methyl transferase (TPMT) deficiency; porphyria. Lactation: not known if excreted in breast milk, do not nurse
Acute lymphatic leukaemia, Crohn's disease
Pregnancy and lactation. Prior resistance to mercaptopurine or thioguanine; severe liver disease; severe bone marrow suppression.
>10% Elevated LFT's (15%) 1-10% Nausea (10%),Vomiting (10%),Stomatitis (3-10%),Thrombocytopenia (3-10%),Rash (1-3%),Diarrhea (1-3%),Dizziness (1-3%),Alopecia (1-3%),Leukopenia (1-3%) Frequency Not Defined Fatigue,Anorexia,Headache,Chills and fever,Chest pain,Mucositis,Upper respiratory infection,Cough,Ulceration of intestine,Ulcerative stomatitis,Myelosuppressionm,Decreased hematocrit,Hepatotoxicity,Decreased resistance to infections,Hyperuricemia,Nephrotoxicity,Increased risk of pancreatitis in pts with IBD,Hyperpigmentation of skin,Arthralgias,Eye discomfort,Tinnitus Potentially Fatal: Myelosuppression; hepatotoxicity, cholestatic jaundice.
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Mercaptopurine is a purine antagonist which is converted intracellularly into its active nucleotides, including thioinosinic acid. The nucleotides inhibit several reactions which ultimately interferes with nucleic acid synthesis and prevents the formation of RNA and DNA.
Anticoagulant action of warfarin may be inhibited by mercaptopurine. Enhanced toxicity with myelosuppressive drugs. Potentially Fatal: Effects enhanced by allopurinol (reduce dose of mercaptopurine). Other hepatotoxic drugs (e.g. doxorubicin) potentiate toxicity.
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