Drug interactions
Cyclophosphamide + Pentostatin
Severity: Major
Cyclophosphamide and Pentostatin: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Pentostatin combined with high-dose cyclophosphamide in transplant conditioning regimens has been associated with fatal pulmonary edema and hypotension. The combination also increases overall toxicity of both agents.
What this interaction means in plain words
Cyclophosphamide and Pentostatin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Cyclophosphamide belongs to Oncology; Pentostatin belongs to Oncology.
Why it happens
Additive cardiopulmonary and cytotoxic toxicity; the precise mechanism is not fully established.
What to do
Avoid pentostatin with high-dose cyclophosphamide in ablative transplant regimens. If standard-dose combinations are used, monitor fluid status, blood pressure and respiratory function closely.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Pentostatin
- Carmustine + Pentostatin Contraindicated
- Etoposide + Pentostatin Contraindicated
- Fludarabine + Pentostatin Contraindicated
- Deferiprone + Pentostatin Major
- Fingolimod + Pentostatin Major
- Nelarabine + Pentostatin Major
Other interactions of Cyclophosphamide
Frequently asked questions
Can I take Cyclophosphamide with Pentostatin?
MediHelp rates the interaction as major. Cyclophosphamide and Pentostatin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Pentostatin combined with high-dose cyclophosphamide in transplant conditioning regimens has been associated with fatal pulmonary edema and hypotension. The combination also increases overall toxicity of both agents.
How serious is the interaction between Cyclophosphamide and Pentostatin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid pentostatin with high-dose cyclophosphamide in ablative transplant regimens. If standard-dose combinations are used, monitor fluid status, blood pressure and respiratory function closely.
What other medicines interact with Pentostatin?
MediHelp also lists interactions of Pentostatin with, for example, Carmustine, Etoposide, Fludarabine. The full list is on the Pentostatin page.
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