Study Evaluating the Potential of DVS SR to Inhibit the CYP2D6 Pathway
To evaluate the effects of multiple oral doses of desvenlafaxine sustained release (DVS SR) and paroxetine on the biotransformation of codeine to morphine in healthy subjects. To assess the safety and tolerability of DVS SR and paroxetine when coadministered with codeine to healthy subjects.
Depressive Disorder, Major
Drug: desvenlafaxine sustained release (DVS SR)
|Study Design:||Allocation: Randomized
Endpoint Classification: Pharmacokinetics Study
Intervention Model: Crossover Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||A Randomized, Open-Label, 3-Period Crossover Study to Evaluate the Effect of Multiple Doses of DVS SR and Paroxetine on the CYP2D6 Biotransformation of Codeine to Morphine in Healthy Subjects.|
- the biotransformation of codeine to morphine and the safety and tolerability of DVS SR
|Study Start Date:||January 2007|
|Study Completion Date:||March 2007|
This is a randomized, open-label, inpatient/outpatient, 3-period crossover study in healthy subjects.The study will consist of 3 treatment periods. In treatment period 1, subjects will be randomly assigned on study day 1. A single 60-mg dose of codeine will be administered to all subjects. In periods 2 and 3, subjects will receive either DVS SR 100 mg/day or paroxetine 20 mg/day until the steady state is reached. At steady state, subjects will receive codeine 60 mg concomitantly with either DVS SR 100 mg or paroxetine 20 mg, depending on the treatment sequence to which they are assigned. DVS SR 100 mg or paroxetine 20 mg administration will continue for an additional 2 days. In treatment period 3, subjects will receive the alternative treatment sequence.