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6-Mercaptopurine (6-mercaptopurine)

Pfizer Inc. · FDA-approved active ✓ Verified Jun 2026 Quality 20/100

6-Mercaptopurine (generic name: 6-mercaptopurine) is a drug developed by Pfizer Inc.. It is currently FDA-approved for Acute lymphoid leukemia, Acute promyelocytic leukemia, FAB M3.

6-Mercaptopurine, also known as Purinethol, is a small molecule medication used to treat acute lymphocytic leukemia (ALL) and other conditions such as Crohn's disease and ulcerative colitis. It is typically taken orally and is often used in combination with other medications, including methotrexate, for the treatment of ALL.

At a glance

Generic name6-mercaptopurine
SponsorPfizer Inc.
TargetMultidrug resistance-associated protein 4, Multidrug resistance-associated protein 5, Thiopurine S-methyltransferase
Therapeutic areaOncology
PhaseFDA-approved

Approved indications

Common side effects

No common side effects on file.

Key clinical trials

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

SourceUsed for
ClinicalTrials.govTrial enrolment, design, endpoints, results

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Frequently asked questions about 6-Mercaptopurine

What is 6-Mercaptopurine?

6-Mercaptopurine (6-mercaptopurine) is a pharmaceutical drug developed by Pfizer Inc., indicated for Acute lymphoid leukemia, Acute promyelocytic leukemia, FAB M3.

What is 6-Mercaptopurine used for?

6-Mercaptopurine is indicated for Acute lymphoid leukemia, Acute promyelocytic leukemia, FAB M3.

Who makes 6-Mercaptopurine?

6-Mercaptopurine is developed and marketed by Pfizer Inc. (see full Pfizer Inc. pipeline at /company/pfizer).

What is the generic name of 6-Mercaptopurine?

6-mercaptopurine is the generic (nonproprietary) name of 6-Mercaptopurine.

What development phase is 6-Mercaptopurine in?

6-Mercaptopurine is FDA-approved (marketed).

What does 6-Mercaptopurine target?

6-Mercaptopurine targets Multidrug resistance-associated protein 4, Multidrug resistance-associated protein 5, Thiopurine S-methyltransferase.

Related

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing