Conditions: Attention Deficit Hyperactivity Disorder
Keywords: randomized double blind placebo controlled
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 67
Healthy volunteers: no

Brief summary:
This is a Phase 2 multicenter, randomized, double-blind trial of MK-8777 (Org 26576, SCH 900777) in adult subjects with Attention-Deficit/Hyperactivity Disorder (ADHD). MK-8777 or placebo will be administered in a crossover fashion for two 3-week treatment periods. The two 3-week treatment periods will be separated by a 2-week placebo washout period.

The primary objective is to compare the efficacy of various doses of MK-8777 to that of placebo in the treatment of ADHD symptoms in adults.

Detailed description:

Arms:
arm 1: Participants receive a fixed dose (FD) of MK-8777 100 mg twice each day (BID) for 3 weeks (Treatment Period 1). After a 2-week placebo washout period, participants receive a fixed dose of placebo (PBO) BID for 3 weeks (Treatment Period 2). arm 2: Participants receive a fixed dose of placebo BID for 3 weeks (Treatment Period 1). After a 2-week placebo washout period, participants receive a fixed dose of MK-8777 100 mg BID for 3 weeks (Treatment Period 2). arm 3: Participants receive rising doses (RD) of MK-8777 100-300 mg BID for 3 weeks (Treatment Period 1). After a 2-week placebo washout period, participants receive rising doses of placebo BID for 3 weeks (Treatment Period 2). arm 4: Participants receive rising doses of placebo BID for 3 weeks (Treatment Period 1). After a 2-week placebo washout period, participants receive rising doses of MK-8777 100-300 mg BID for 3 weeks (Treatment Period 2).

Interventions: intervention 1: MK-8777 intervention 2: Placebo
Intervention descriptions: intervention 1: None intervention 2: None

Protocol document: