AdverseEvent.ai
This page presents data from the FDA Adverse Event Reporting System (FAERS) and the FDA-approved drug label. A report submitted to FAERS does not prove a drug caused the reported event. Always consult a healthcare provider about medications.

Cyclophosphamide (cyclophosphamide for injection)

Last updated: June 18, 2026
Preview tracking

Cyclophosphamide is the brand name for cyclophosphamide for injection. According to the FDA-approved label, Cyclophosphamide for Injection is an alkylating drug indicated for treatment of adults and pediatric patients with: • Malignant Diseases: malignant lymphomas: Hodgkin’s disease, lymphocytic lymphoma, mixed-cell type lymphoma, histiocytic lymphoma, Burkitt’s lymphoma;. FAERS contains 172,256 submissions naming this drug from 2003 through 2026; the top three reactions cited are off label use, febrile neutropenia, and neutropenia.

Most-Reported Reactions

Counts of the reactions most often cited in FAERS submissions that named Cyclophosphamide. Inclusion here does not establish causation - submitters describe what was observed, not what was confirmed. One submission can list several reactions, so the totals exceed the report count.

OFF LABEL USE 15,866 (9.2%) FEBRILE NEUTROPENIA 14,218 (8.3%) NEUTROPENIA 10,341 (6.0%) DRUG INEFFECTIVE 10,334 (6.0%) PYREXIA 9,068 (5.3%) DISEASE PROGRESSION 7,924 (4.6%) PNEUMONIA 6,510 (3.8%) PRODUCT USE IN UNAPPROVED INDICATION 6,446 (3.7%) THROMBOCYTOPENIA 6,350 (3.7%) NAUSEA 6,104 (3.5%) ANAEMIA 5,981 (3.5%) SEPSIS 5,610 (3.3%) DIARRHOEA 5,387 (3.1%) DEATH 5,152 (3.0%) VOMITING 4,800 (2.8%)

Patient Demographics

Patient sex and age across the FAERS submissions that named Cyclophosphamide. Percentages here are computed only from submissions where these fields were filled in - many leave them blank.

By Sex

Female Male Unknown

By Age Group

0-17 18-44 45-64 65+

Severity Outcomes

Severity flags recorded across the 172,256 FAERS submissions that named Cyclophosphamide. Each bar shows the count of those reports carrying that flag. A single case can carry more than one (a hospitalization that became life-threatening, for example), so these bars are independent rates - they don't sum to 100%. Inclusion of a case under any flag does not establish that the drug caused the outcome.

DEATH 35,011 (20.3%) HOSPITALIZATION 62,339 (36.2%) LIFE-THREATENING 13,623 (7.9%) DISABLING 2,741 (1.6%)

Submissions Per Quarter

Quarterly count of FAERS submissions that named Cyclophosphamide. Ups and downs on this chart can track prescribing volume, news cycles, or shifts in how reports get filed, rather than the drug becoming safer or more dangerous.

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

From the FDA-Approved Label

Excerpts from the official FDA-approved prescribing information for Cyclophosphamide. This is the authoritative source on indications, warnings, and known adverse reactions.

Indications

1 INDICATIONS AND USAGE Cyclophosphamide for Injection is an alkylating drug indicated for treatment of adults and pediatric patients with: • Malignant Diseases: malignant lymphomas: Hodgkin’s disease, lymphocytic lymphoma, mixed-cell type lymphoma, histiocytic lymphoma, Burkitt’s lymphoma; multiple myeloma, leukemias, mycosis fungoides, neuroblastoma, adenocarcinoma of ovary, retinoblastoma, breast carcinoma ( 1.1 ) • Minimal Change Nephrotic Syndrome in Pediatric Patients: biopsy proven minimal change nephrotic syndrome patients who failed to adequately respond to or are unable to tolerate adrenocorticosteroid therapy ( 1.2 ) Limitations of Use: The safety and effectiveness for the treatment of nephrotic syndrome in adults or other renal disease has not been established. ( 1.2 ) 1.1 Malignant Diseases Cyclophosphamide for Injection is indicated for the treatment of adult and pediatric patients with: •malignant lymphomas (Stages III and IV of the Ann Arbor staging system), Hodgkin’s disease, lymphocytic lymphoma (nodular or diffuse), mixed-cell type lymphoma, histiocytic lymphoma, Burkitt’s lymphoma •multiple myeloma •leukemias: Chronic lymphocytic leukemia, chronic granulocytic l...

Adverse Reactions (from label)

6 ADVERSE REACTIONS The following adverse reactions are discussed in more detail in other sections of the labeling. Hypersensitivity [see Contraindications ( 4 )] Myelosuppression, Immunosuppression, Bone Marrow Failure, and Infections [see Warnings and Precautions ( 5.1 )] Urinary Tract and Renal Toxicity [see Warnings and Precautions ( 5.2 )] Cardiotoxicity [see Warnings and Precautions ( 5.3 )] Pulmonary Toxicity [see Warnings and Precautions ( 5.4 )] Secondary Malignancies [see Warnings and Precautions ( 5.5 )] Veno-occlusive Liver Disease [see Warnings and Precautions ( 5.6 )] Infertility [see Warnings and Precautions ( 5.8 ) and Use in Specific Populations ( 8.3 , 8.4 )] Impaired Wound Healing [see Warnings and Precautions ( 5.9 )] Hyponatremia [see Warnings and Precautions ( 5.10 )] Adverse reactions reported most often include neutropenia, febrile neutropenia, fever, alopecia, nausea, vomiting, and diarrhea. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Slate Run Pharmaceuticals at 1-888-341-9214 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch 6.1 Clinical Trials and Postmarketing Experience The following adverse reactions associated with the use of cyclophosphami...

FDA label effective date: 2025-04-02

Disclaimer

AdverseEvent.ai is not affiliated with the FDA. Adverse-event counts come from the FDA Adverse Event Reporting System (FAERS). Drug labels come from the FDA drug label dataset. A report submitted to FAERS does not prove a drug caused the reported event — always consult a healthcare provider about medications. This site is for informational purposes only and is not medical advice.