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  • Title: Lack of interaction between nefazodone and cimetidine: a steady state pharmacokinetic study in humans.
    Author: Barbhaiya RH, Shukla UA, Greene DS.
    Journal: Br J Clin Pharmacol; 1995 Aug; 40(2):161-5. PubMed ID: 8562300.
    Abstract:
    The steady-state pharmacokinetic interaction between nefazodone and cimetidine was evaluated in a three-period crossover study consisting of three treatments of 1 week duration with a 1 week washout between treatments. The 18 healthy, male study subjects received: nefazodone hydrochloride 200 mg twice daily (every 12 h) for 6 days; cimetidine 300 mg four times daily for 6 days; and 200 mg nefazodone hydrochloride twice daily + 300 mg cimetidine four times daily for 6 days. On day 7 of each treatment, only the morning dose was administered. Serial blood samples were collected for pharmacokinetic analysis after drug administration on day 7 of each treatment; blood samples for trough levels (Cmin) to assess attainment of steady state, were also collected just prior to the morning doses on days 2-7 of each study period. Plasma samples were assayed for cimetidine, and nefazodone and its metabolites hydroxynefazodone and m-chlorophenylpiperazine by specific, validated h.p.l.c. methods. Statistical analyses of Cmin data indicated that, regardless of treatment, steady state was achieved for cimetidine by day 2 and for nefazodone and its metabolites by day 3 of multiple dosing, and that there were no significant differences in Cmin levels between treatments. When nefazodone and cimetidine were co-administered for 1 week, no change in steady-state pharmacokinetic parameters for cimetidine, nefazodone or hydroxynefazodone was observed compared with each drug dosed alone.(ABSTRACT TRUNCATED AT 250 WORDS)
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