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CLINICAL TRIAL, PHASE I
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
A Phase I study of the pharmacokinetics, safety and tolerability of a novel tocopheryl phosphate mixture/oxymorphone transdermal patch system.
Pain Management 2017 November
AIM: Characterize the pharmacokinetic profile and tolerability of two tocopheryl phosphate mixture/oxymorphone patch formulations in healthy subjects, and the active metabolite (6-OH-oxymorphone).
MATERIALS & METHODS: Fifteen participants received a single application of oxymorphone patches +/- capsaicin for 72 h and were crossed-over for another 72 h.
RESULTS: Plasma oxymorphone was detected approximately 7 h and 6-OH-oxymorphone after approximately 18-19 h postapplication of both formulations, respectively. For oxymorphone, median tmax was 24 h, and Cmax /Cmin ratio was approximately 2.4. The most frequently reported treatment-related adverse event was application site reaction, mainly with capsaicin formulation.
CONCLUSION: Tocopheryl phosphate mixture/oxymorphone transdermal patches can successfully deliver therapeutic amounts of oxymorphone in a sustained manner over 72 h and are well tolerated. ANZCTR registration number: ACTRN12614000613606.
MATERIALS & METHODS: Fifteen participants received a single application of oxymorphone patches +/- capsaicin for 72 h and were crossed-over for another 72 h.
RESULTS: Plasma oxymorphone was detected approximately 7 h and 6-OH-oxymorphone after approximately 18-19 h postapplication of both formulations, respectively. For oxymorphone, median tmax was 24 h, and Cmax /Cmin ratio was approximately 2.4. The most frequently reported treatment-related adverse event was application site reaction, mainly with capsaicin formulation.
CONCLUSION: Tocopheryl phosphate mixture/oxymorphone transdermal patches can successfully deliver therapeutic amounts of oxymorphone in a sustained manner over 72 h and are well tolerated. ANZCTR registration number: ACTRN12614000613606.
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