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Busulfan

Busulfan is an active ingredient of the class «alkyl sulfonate».

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Chemical compound

Informational only — not medical advice. Ask a doctor or pharmacist; never change a dose on your own.

Boxed warning (US label)

WARNING MYLERAN is a potent drug. It should not be used unless a diagnosis of chronic myelogenous leukemia has been adequately established and the responsible physician is knowledgeable in assessing response to chemotherapy.

What it is used for

MYLERAN (busulfan) is indicated for the palliative treatment of chronic myelogenous (myeloid, myelocytic, granulocytic) leukemia.

US label

Busulfan Fresenius Kabi followed by cyclophosphamide (BuCy2) is indicated as conditioning treatment prior to conventional haematopoietic progenitor cell transplantation (HPCT) in adult patients when the combination is considered the best available option.

EMA

How it works

Class: alkyl sulfonate

Common side effects

Hematological Effects The most frequent, serious, toxic effect of busulfan is dose-related myelosuppression resulting in leukopenia, thrombocytopenia, and anemia. Myelosuppression is most frequently the result of a failure to discontinue dosage in the face of an undetected decrease in leukocyte or platelet counts.

US label

Who should not take it

MYLERAN is contraindicated in patients in whom a definitive diagnosis of chronic myelogenous leukemia has not been firmly established.

US label

Pregnancy and breastfeeding

Busulfan may cause fetal harm when administered to a pregnant woman.

It is not known whether this drug is excreted in human milk.

Excerpts from the US prescribing label (public domain), copied without changes.

Interactions

Recorded interactions from open sources (Wikidata, US labels). The list is not complete — ask a pharmacist.

Brand names

United States

Busulfex · Myleran

European Union

Busulfan Fresenius Kabi

Canada

Myleran · Pms-Busulfan

Other trade names

Busilvex

Approval status

US Food and Drug Administration
prescription · since 1954
European Medicines Agency
authorised · since 2014
Health Canada
prescription · marketed
First approval anywhere
1954

Codes

ATC
L01AB01
RxNorm CUI
1828
ChEMBL
CHEMBL820
PubChem CID
2478
UNII
G1LN9045DK
Wikidata
Q348922

Frequently asked questions

What is Busulfan used for?

Busulfan is used for: Myelofibrosis, Acute myeloid leukemia, B-cell lymphoma, Chronic myeloid leukemia, Polycythemia vera, Leukemia, Neoplasm, and Hematopoietic stem cell transplantation.

What kind of medicine is Busulfan?

Busulfan is an active ingredient of the class «alkyl sulfonate».

What are the brand names of Busulfan?

Brand names of Busulfan include Busulfex, Myleran, Busulfan Fresenius Kabi, Pms-Busulfan, and Busilvex.

Medicines in the same class

Sources and licences

Updated November 15, 2026