• J Pain Symptom Manage · Aug 2003

    Randomized Controlled Trial Comparative Study Clinical Trial

    A pharmacokinetic study to compare two simultaneous 400 microg doses with a single 800 microg dose of oral transmucosal fentanyl citrate.

    • Maureen Lee, Steven E Kern, James C Kisicki, and Talmage D Egan.
    • College of Pharmacy, Department of Pharmaceutics, University of Utah, Salt Lake City, 84108, USA.
    • J Pain Symptom Manage. 2003 Aug 1; 26 (2): 743-7.

    AbstractIt is unknown whether two smaller doses of oral transmucosal fentanyl citrate (OTFC) administered simultaneously are pharmacokinetically equivalent to an identical dose administered as a single unit. This issue has important practical implications when patients are attempting to identify the appropriate dosage of OTFC to control their pain. This open-label, randomized, crossover design study compared the pharmacokinetics of two simultaneously consumed 400 microg OTFC doses with one 800 microg OTFC dose in 12 healthy volunteers. The two treatments were pharmacokinetically equivalent. The maximum concentration produced for each dosage group (Cmax) was 1.09 ng/ml for two 400 microg dose and 1.10 ng/ml for one 800 microg dose. Area under the curve (AUC) was 8.2 ng/ml.hr (SE=1.1) and 7.2 ng/ml.hr (SE=1.0). There were no significant differences between the treatment groups in either the time to peak concentration (Tmax) or the mean residence time (MRT). The results demonstrate the bioequivalence of two 400 microg with one 800 microg OTFC units.

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