Influence of alcohol on the pharmacokinetics of diazepam controlled-release formulation in healthy volunteers.
Twelve normal volunteers were empanelled in an open-label, three-way crossover study to evaluate the influence of alcohol on the pharmacokinetics of controlled-release diazepam capsules. Each volunteer received one 15-mg diazepam controlled-release capsule alone, concomitantly with alcohol or followed by alcohol 2 hours later. The mean plasma concentration-time profiles following both alcohol treatments were superimposable on the profile from the control. The mean plateau concentrations were observed to endure from 2 through 12 hours in all cases. The mean +/- S.D. areas under the plasma concentration-time curves from time zero to infinity were similar indicating no difference in the extent of absorption of diazepam in the presence of alcohol. The harmonic mean elimination half-lives were also similar. Overall, the pharmacokinetics and the release properties of controlled-release diazepam capsule were not influenced by alcohol in normal volunteers.
D000328:Adult; D000438:Alcohols / Q000378:metabolism / Q000494:pharmacology*; D003975:Diazepam / Q000097:blood / Q000494:pharmacology*; D004347:Drug Interactions; D006801:Humans; D008297:Male; D011897:Random Allocation
D000438:Alcohols; D003975:Diazepam