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  • Title: Effects of probenecid and cimetidine on the pharmacokinetics of nemonoxacin in healthy Chinese volunteers.
    Author: Zhang YF, Dai XJ, Yang Y, Chen XY, Wang T, Tang YB, Tsai CY, Chang LW, Chang YT, Zhong DF.
    Journal: Drug Des Devel Ther; 2016; 10():357-70. PubMed ID: 26855561.
    Abstract:
    PURPOSE: To investigate the effects of probenecid and cimetidine on the pharmacokinetics of nemonoxacin in humans. METHODS: Two independent, open-label, randomized, crossover studies were conducted in 24 (12 per study) healthy Chinese volunteers. In Study 1, each volunteer received a single oral dose of 500 mg of nemonoxacin alone or with 1.5 g of probenecid divided into three doses within 25 hours. In Study 2, each volunteer received a single oral dose of 500 mg of nemonoxacin alone or with multiple doses of cimetidine (400 mg thrice daily for 7 days). The plasma and urine nemonoxacin concentrations were determined using validated liquid chromatography-tandem mass spectrometry methods. RESULTS: Coadministration of nemonoxacin with probenecid reduced the renal clearance (CLr) of nemonoxacin by 22.6%, and increased the area under the plasma concentration-time curve from time 0 to infinity (AUC0-∞) by 26.2%. Coadministration of nemonoxacin with cimetidine reduced the CLr of nemonoxacin by 13.3% and increased AUC0-∞ by 9.4%. Coadministration of nemonoxacin with probenecid or cimetidine did not significantly affect the maximum concentration of nemonoxacin or the percentage of the administered dose recovered in the urine. CONCLUSION: Although probenecid reduced the CLr and increased the plasma exposure of nemonoxacin, these effects are unlikely to be clinically meaningful at therapeutic doses. Cimetidine had weaker, clinically meaningless effects on the pharmacokinetics of nemonoxacin.
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