These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Pharmacokinetic interaction between efavirenz and carbamazepine after multiple-dose administration in healthy subjects.
    Author: Ji P, Damle B, Xie J, Unger SE, Grasela DM, Kaul S.
    Journal: J Clin Pharmacol; 2008 Aug; 48(8):948-56. PubMed ID: 18519918.
    Abstract:
    The effect of efavirenz on the pharmacokinetics of carbamazepine and vice versa was investigated in adult healthy subjects in a randomized, open-label, 2-period crossover, multiple-dose study. Subjects were randomized to receive either efavirenz 600 mg qd for 14 days or carbamazepine titrated to 400 mg qd for 21 days followed with both drugs for another 21 or 14 days. The pharmacokinetics was evaluated for efavirenz, carbamazepine, and the major metabolite of carbamazepine, carbamazepine-10,11-epoxide. Coadministration of carbamazepine with efavirenz significantly reduced the exposure of efavirenz (geometric mean ratios [90% confidence interval]: area of plasma concentration-time curve during the dosing interval of 24 hours [AUCtau], 0.64 [0.60-0.68]; maximum plasma concentration [C(max)], 0.79 [0.74, 0.85]) and carbamazepine (AUC(tau), 0.73 [0.67-0.80]; C(max), 0.80 [0.76, 0.85]) but had minimal impact on the exposure of carbamazepine-10,11-epoxide (AUC(tau), 0.99 [0.85-1.15]; C(max), 1.05 [0.91, 1.22]). In summary, a 2-way pharmacokinetic interaction between efavirenz and carbamazepine was demonstrated in this study.
    [Abstract] [Full Text] [Related] [New Search]