Drug Interaction Report

Consumer information for this interaction is not currently available.

MONITOR: Coadministration of clobazam with inhibitors of CYP450 2C19 may significantly increase the plasma concentrations of its active metabolite, N-desmethylclobazam, which is primarily metabolized by the isoenzyme. Based on extrapolation from pharmacogenomic data, inhibition of CYP450 2C19 may result in up to a 5-fold increase in exposure to N-desmethylclobazam. At therapeutic dosages of clobazam, plasma concentrations of N-desmethylclobazam are 3 to 5 times higher than those of the parent compound. Based on animal and in vitro receptor binding data, estimates of the relative potency of N-desmethylclobazam compared to parent compound range from 1/5 to equal potency.

MANAGEMENT: Dosage adjustment of clobazam may be necessary when coadministered with strong (e.g., fluconazole, fluvoxamine, ticlopidine) or moderate (e.g., omeprazole) inhibitors of CYP450 2C19.

Alcohol can increase the nervous system side effects of cloBAZam such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with cloBAZam. Do not use more than the recommended dose of cloBAZam, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.