G-Cyclophosphamide Cyclophosphamide Phenobarbital
ModerateTaking high doses of phenobarbital for a long time has been reported to make the body break down cyclophosphamide faster. This can also make cyclophosphamide lower your white blood cell count more than usual, which may leave you more open to infections.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.