Mertabto 10mg Tablet

About

Mercaptopurine is a crucial antimetabolite antineoplastic agent, classified as a purine analog, primarily indicated for the treatment of acute lymphoblastic leukemia (ALL) and certain other leukemias. Its therapeutic efficacy stems from its ability to act as a false metabolite, profoundly interfering with nucleic acid synthesis within rapidly dividing cancer cells. Specifically, mercaptopurine is converted intracellularly by hypoxanthine-guanine phosphoribosyltransferase (HGPRT) into its active metabolites, 6-thioguanine nucleotides (6-TGNs). These 6-TGNs are then incorporated into both DNA and RNA, leading to the inhibition of de novo purine synthesis and disruption of DNA replication and transcription. This ultimately results in cell cycle arrest and programmed cell death (apoptosis) in malignant cells. The metabolism of mercaptopurine is significantly influenced by the activity of the enzyme thiopurine methyltransferase (TPMT), which can necessitate genetic testing to guide dosing and minimize toxicity.

Uses

• Treatment of acute lymphoblastic leukemia (ALL).
• Maintenance therapy for ALL.
• Treatment of acute myeloid leukemia (AML).
• Treatment of chronic myeloid leukemia (CML).

Directions For Use

Taken orally, usually once daily, often in the evening, with or without food, as directed by a physician.

Benefits

• Crucial component of ALL treatment regimens.
• Effective in inducing and maintaining remission.
• Can be used in combination chemotherapy.
• Well-established efficacy in pediatric and adult leukemias.
• Oral administration offers convenience.
• Helps prevent relapse in leukemia.

Side Effects

• Myelosuppression (leukopenia, thrombocytopenia, anemia)
• Nausea and vomiting
• Diarrhea
• Anorexia
• Hepatotoxicity
• Mucositis
• Skin rash
• Pancreatitis
• Fever
• Hyperuricemia
• Alopecia (rare)
• Infections

Safety Measures

• Alcohol - Avoid alcohol due to potential for increased liver toxicity and gastrointestinal irritation.
• Pregnancy - Contraindicated in pregnancy due to severe teratogenicity; use effective contraception.
• Breastfeeding - Discontinue breastfeeding as mercaptopurine is excreted in breast milk and can cause serious harm to the infant.
• Liver - Use with extreme caution in patients with hepatic impairment; monitor liver function closely and adjust dose.
• Kidney - Dose adjustment is required for patients with renal impairment due to reduced drug clearance.
• Lung - Generally safe for lung conditions, but monitor for any unusual respiratory symptoms or infections.

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