Abstract:
:Our aim was to assess the effect of miconazole oral gel on the pharmacokinetics of oral oxycodone. In an open crossover study with two phases, 12 healthy volunteers took a single oral dose of 10 mg of immediate-release oxycodone with or without thrice-daily 85-mg miconazole oral gel treatment. The plasma concentrations of oxycodone and its oxidative metabolites were measured for 48 h. Pharmacological effects of oxycodone were recorded for 12 h. Pharmacokinetic parameters were compared by use of the geometric mean ratios (GMRs) and their 90% confidence interval (CIs). Pretreatment with miconazole oral gel caused a strong inhibition of the CYP2D6-dependent metabolism and moderate inhibition of the CYP3A4-dependent metabolism of oxycodone. The mean area under the concentration-time curve (AUC) from time zero to infinity (AUC(0-∞); GMR, 1.63; 90% CI, 1.48 to 1.79) and the peak concentration of oxycodone (GMR, 1.31; 90% CI, 1.19 to 1.44) were increased. The AUC of the CYP2D6-dependent metabolite oxymorphone was greatly decreased (GMR, 0.17; 90% CI, 0.09 to 0.31) by miconazole gel, whereas that of the CYP3A4-dependent metabolite noroxycodone was increased (GMR, 1.30; 90% CI, 1.15 to 1.47) by miconazole gel. Differences in the pharmacological response to oxycodone between phases were insignificant. Miconazole oral gel increases the exposure to oral oxycodone, but the clinical relevance of the interaction is moderate. Miconazole oral gel produces a rather strong inhibitory effect on CYP2D6, which deserves further study.
journal_name
Antimicrob Agents Chemotherjournal_title
Antimicrobial agents and chemotherapyauthors
Grönlund J,Saari TI,Hagelberg N,Neuvonen PJ,Olkkola KT,Laine Kdoi
10.1128/AAC.01242-10subject
Has Abstractpub_date
2011-03-01 00:00:00pages
1063-7issue
3eissn
0066-4804issn
1098-6596pii
AAC.01242-10journal_volume
55pub_type
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