Mercaptopurine (6-MP) (mercaptopurine) — Uses, Dosage, Side Effects & Safety

Drug class: Cancer & Oncology

Overview

Mercaptopurine (6-MP) is a prescription medicine used to treat certain types of cancer, most commonly acute lymphoblastic leukemia (ALL) in both children and adults. It may also be used for other conditions as determined by your doctor. Mercaptopurine works by interfering with the growth of cancer cells, slowing or stopping their spread in the body. It is classified as an antimetabolite, which means it disrupts the DNA and RNA synthesis necessary for cell division. Key points for patients: Take mercaptopurine exactly as prescribed, usually once daily. Regular blood tests are needed to monitor for side effects. Inform your doctor about any other medications or supplements you are taking, as interactions are possible. This medicine can lower your immune system, so avoid contact with people who are sick.

Therapeutic uses

• Acute Lymphocytic Leukemia (ALL)
• Acute Myeloid Leukemia (AML)
• Crohn's Disease
• Ulcerative Colitis

Common side effects

• Bone marrow suppression
• Nausea and vomiting
• Diarrhea
• Liver toxicity
• Mouth sores (stomatitis)
• Hair loss
• Increased risk of infection

Frequently Asked Questions about Mercaptopurine (6-MP)

What is mercaptopurine (6-MP) used for?

Mercaptopurine is primarily used to treat acute lymphoblastic leukemia (ALL) and may be used for other cancers or autoimmune conditions as prescribed by your doctor.

How does mercaptopurine work?

Mercaptopurine works by interfering with the DNA and RNA synthesis of rapidly dividing cells, such as cancer cells, slowing or stopping their growth.

What should I do if I miss a dose?

Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose. Do not take two doses at once.

Can I take mercaptopurine during pregnancy?

Mercaptopurine may harm an unborn baby. Inform your doctor if you are pregnant or planning to become pregnant. Effective contraception is recommended during treatment.

What are the most serious side effects?

Serious side effects include bone marrow suppression (low blood counts), severe infections, liver toxicity, and allergic reactions. Contact your doctor immediately if you notice unusual bruising, bleeding, persistent fever, or yellowing of the skin or eyes.

Are there any foods or medicines I should avoid?

Avoid live vaccines, alcohol, and medications that may interact with mercaptopurine, such as allopurinol. Always consult your doctor before starting new medications.

How often will I need blood tests while taking mercaptopurine?

Frequent blood tests are required, especially at the start of treatment, to monitor your blood cell counts and liver function.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.