Conditions: Healthy
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 80
Healthy volunteers: yes

Brief summary:
This study will examine the effects of co-administration of SPD489 and the antidepressant EFFEXOR XR on the pharmacokinetics of lisdexamfetamine, d-amphetamine, and EFFEXOR XR. In addition, serial blood pressure and pulse measures will be obtained and examined to ensure that there are no unexpected changes in vital signs following co administration of SPD489 and EFFEXOR XR that would impact the further study of this drug combination. The hypothesis is that a drug drug interaction could possibly exist.

Detailed description:

Arms:
arm 1: None arm 2: None

Interventions: intervention 1: LDX + Venlafaxine XR intervention 2: Venlafaxine XR + LDX
Intervention descriptions: intervention 1: * Day 1-5 LDX 30mg
* Day 6-10 LDX 50mg
* Day 11-15 LDX 70mg
* Day 16-20 LDX 70mg and Venlafaxine XR 75mg daily
* Day 21-25 LDX 70mg and Venlafaxine XR 150mg daily
* Day 26-30 LDX 70mg and Venlafaxine XR 225mg daily
* Day 31-34 Venlafaxine XR 150mg daily
* Day 35-38 Venlafaxine XR 75mg daily. intervention 2: * Day 1-5 Venlafaxine XR 75mg
* Day 6-10 Venlafaxine XR 150mg
* Day 11-15 Venlafaxine XR 225mg
* Day 16-20 Venlafaxine XR 225mg and LDX 30mg daily
* Day 21-25 Venlafaxine XR and LDX 50mg daily
* Day 26-30 Venlafaxine XR 225mg and LDX 70mg daily
* Day 31-34 Venlafaxine XR 150mg
* Day 35-38 Venlafaxine XR 75mg.

Protocol document: