Carmustine and Phenytoin interaction
Carmustine and Phenytoin: the Carmustine prescribing label describes an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Carmustine label · effective 2026-04-09
Phenytoin: Carmustine for Injection may reduce the efficacy of phenytoin.
Effect of Carmustine for Injection on other drugs Phenytoin: Carmustine for Injection when coadministered with phenytoin may reduce phenytoin serum concentrations.
Consider alternative drugs to phenytoin.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.