Prednisone has no effect on the pharmacokinetics of CYP3A4 metabolized drugs - midazolam and odanacatib.

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Marcantonio EE, Ballard J, Gibson CR, Kassahun K, Palamanda J, Tang C, Evers R, Liu C, Zajic S, Mahon C, Mostoller K, Hreniuk D, Mehta A, Morris D, Wagner JA, Stoch SA

Prednisone has no effect on the pharmacokinetics of CYP3A4 metabolized drugs - midazolam and odanacatib.

J Clin Pharmacol. 2014 Nov;54(11):1280-9. doi: 10.1002/jcph.338. Epub 2014 Jun 25.

PubMed ID

24895078 [ View in PubMed

]

Abstract

We evaluated the effect of prednisone on midazolam and odanacatib pharmacokinetics. In this open-label, 2-period crossover study in healthy male subjects, midazolam 2 mg was administered (Day -1) followed by odanacatib 50 mg (Day 1) during Part 1. In Period 2, prednisone 10 mg once daily (qd) was administered on Days 1-28; odanacatib was co-administered on Day 14 and midazolam 2 mg was co-administered on Days 1 and 28. Subjects were administered midazolam 2 mg on Days 42 and 56. Safety and tolerability were assessed throughout the study. A physiologically-based pharmacokinetic (PBPK) model was also built. There were 15 subjects enrolled; mean age was 31 years. The odanacatib AUC(0- infinity) GMR (90% CI) [odanacatib + prednisone (Day 14, Period 2)/odanacatib alone (Day 1, Period 1] was 1.06 (0.96, 1.17). AUC(0-infinity) GMR (90%CI) [midazolam + prednisone (Day 28, Period 2)/midazolam alone (Day -1, Period 1] was 1.08 (0.93,1.26). There were no serious AEs or AEs leading to discontinuation. PBPK modeling showed that prednisone does not cause significant effects on the exposure of sensitive CYP3A4 substrates in vivo at therapeutic doses. Co-administration of prednisone 10 mg qd had no effect on pharmacokinetics of either odanacatib 10 mg or midazolam 2 mg.

DrugBank Data that Cites this Article

Drug Enzymes

Drug	Enzyme	Kind	Organism	Pharmacological Action	Actions
Odanacatib	Cytochrome P450 3A4	Protein	Humans	No	Substrate	Details