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Chlorambucil Side Effects

The most commonly reported side effects of chlorambucil include off label use, neutropenia, and pneumonia, based on 3,995 FDA adverse event reports from 2004 to 2025. 4.4% of reports found the drug to be ineffective.

Chlorambucil side effects

Percentages show how often each reaction appears relative to total reports for chlorambucil.

1
Off Label Use6.4%257
2
Neutropenia6.1%242
3
Pneumonia5.7%227
4
Pyrexia5.2%208
5
Drug Ineffective4.4%175
6
Thrombocytopenia4.2%169
7
Febrile Neutropenia3.5%139
8
Disease Progression3.4%136
9
Anaemia3.2%129
10
Acute Myeloid Leukaemia2.9%117
11
Dyspnoea2.7%106
12
Death2.6%105
13
Infection2.6%104
14
Infusion Related Reaction2.5%101
15
Fatigue2.4%96

These are voluntary reports and do not establish that chlorambucil caused these reactions.

Report severity

93.4%Serious3,733 reports
42.3%Hospitalizations1,691 reports
23.6%Fatal944 reports

Seriousness is determined by the reporter, not by OpenClaim.

Chlorambucil drug interactions

Other drugs that appear in adverse event reports alongside chlorambucil. Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.

Also suspected

1
Rituximab30.2%1,207
2
Obinutuzumab23.8%949
3
Cyclophosphamide19.7%789
4
Vincristine-sulfate15.8%632
5
Prednisone15.8%631
6
Fludarabine-phosphate15.3%610
7
Doxorubicin-hydrochloride14.7%589
8
Prednisolone11.6%463
9
Bendamustine-hydrochloride9.4%376
10
Dexamethasone9.3%372
11
Ofatumumab8.4%336
12
Ibrutinib8.1%324
13
Etoposide6.7%269
14
Procarbazine-hydrochloride5.7%228
15
Cytarabine4.4%175

Taken alongside

1
Allopurinol12.4%495
2
Acetaminophen11.3%453
3
Prednisone6.7%267
4
Metoclopramide-hydrochloride5.9%234
5
Aspirin5.4%216
6
Amoxicillin4.6%185
7
Furosemide4.4%176
8
Prednisolone4.3%171
9
Acyclovir4.1%164
10
Omeprazole4.0%159
11
Chlorpheniramine3.9%155
12
Hydrocortisone3.7%148
13
Cyclophosphamide3.7%147
14
Dexamethasone3.6%145
15
Simvastatin3.5%141

Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.

Who reports chlorambucil side effects

30.3% of chlorambucil adverse event reports involve female patients and 54.5% involve male patients. The largest age group is elderly at 71%. These figures reflect who reports side effects, not underlying risk.

Sex

Female30.3%
Male54.5%
Unknown15.1%

Age group

< 2<0.1%
2–110.6%
12–170.6%
18–6427.6%
65+71.2%

What is chlorambucil used for

Conditions and purposes for which patients were taking chlorambucil when the adverse event was reported.

Acute Lymphocytic LeukaemiaAmyloidosisAnaemiaAnaplastic Large Cell Lymphoma T- And Null-cell TypesAnaplastic Large-cell LymphomaAntisynthetase SyndromeAutoimmune DisorderAutoimmune Haemolytic AnaemiaAcute Myeloid LeukaemiaAutoimmune Haemolytic AnaemiaB-cell LymphomaB-cell Lymphoma RecurrentB-cell Small Lymphocytic LymphomaB-cell Unclassifiable Lymphoma Low GradeB-cell Lymphoma

Showing 15 of 207 indications

Chlorambucil brand names and reporting trend

Chlorambucil is sold under the brand name Leukeran.

Brand names

Leukeran3,770

Quarterly reports (20042025)

20052010201520202025

An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.

Taking chlorambucil with another medication?

Ask OpenClaim about your specific drug combination. Get a sourced report using FDA data, drug labels, and medical literature.