Conditions: Primary Insomnia
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 326
Healthy volunteers: no

Brief summary:
This was a cross-over, polysomnography (PSG) study to test the safety, tolerability and effectiveness of different doses of MK-6096 in the treatment of participants with primary insomnia. The primary efficacy hypothesis was that at least one dose of MK-6096 is superior to placebo in improving sleep efficiency (SE) as measured by PSG on Night 1 and at the end of 4 weeks of treatment (Week 4).

Detailed description:

Arms:
arm 1: Prior to Treatment Period 1, participants undergo a 3 week screening period and receive single-blind placebo for the last 2 weeks if screening criteria are met. During Treatment Period 1, participants receive MK-6096 2.5 mg daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory on Days 1 and 29 for overnight polysomnography (PSG) recordings, on which days they receive MK-6096 30 minutes before bedtime. Treatment Period 1 is followed by a 2-week washout period during which the participant receives single-blind placebo for the first 3 days and no treatment for the remaining 11 days. During Treatment Period 2, participants receive dose-matched placebo to MK-6096 daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29 (Study Days 44 and 72), on which days they receive placebo 30 minutes before bedtime. arm 2: Prior to Treatment Period 1, participants undergo a 3 week screening period and receive single-blind placebo for the last 2 weeks if screening criteria are met. During Treatment Period 1, participants receive matched placebo to MK-6096 daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29, on which days they receive placebo 30 minutes before bedtime. Treatment Period 1 is followed by a 2-week washout period during which the participant receives single-blind placebo for the first 3 days and no treatment for the remaining 11 days. During Treatment Period 2, participants receive MK-6096 2.5 mg daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29 (Study Days 44 and 72), on which days they receive MK-6096 30 minutes before bedtime. arm 3: Prior to Treatment Period 1, participants undergo a 3 week screening period and receive single-blind placebo for the last 2 weeks if screening criteria are met. During Treatment Period 1, participants receive MK-6096 5 mg daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory on Days 1 and 29 for 2 overnight PSG recordings, on which days they receive MK-6096 30 minutes before bedtime. Treatment Period 1 is followed by a 2-week washout period during which the participant receives single-blind placebo to MK-6096 for the first 3 days and no treatment the remaining 11 days. During Treatment Period 2, participants receive matched placebo to MK-6096 daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29 (Study Days 44 and 72), on which days they receive placebo 30 minutes before bedtime. arm 4: Prior to Treatment Period 1, participants undergo a 3 week screening period and receive single-blind placebo for the last 2 weeks if screening criteria are met. During Treatment Period 1, participants receive matched placebo to MK-6096 daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29, on which days they receive placebo 30 minutes before bedtime. Treatment Period 1 is followed by a 2-week washout period during which the participant receives single-blind placebo for the first 3 days and no treatment the remaining 11 days. During Treatment Period 2, participants receive MK-6096 5 mg daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29 (Study Days 44 and 72), on which days they receive MK-6096 30 minutes before bedtime. arm 5: Prior to Treatment Period 1, participants undergo a 3 week screening period and receive single-blind placebo for the last 2 weeks if screening criteria are met. During Treatment Period 1, participants receive MK-6096 10 mg daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory on Days 1 and 29 for 2 overnight PSG recordings, on which days they receive MK-6096 30 minutes before bedtime. Treatment Period 1 is followed by a 2-week washout period during which the participant receives single-blind placebo to MK-6096 for the first 3 days and no treatment the remaining 11 days. During Treatment Period 2, participants receive matched placebo to MK-6096 daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29 (Study Days 44 and 72), on which days they receive placebo 30 minutes before bedtime. arm 6: Prior to Treatment Period 1, participants undergo a 3 week screening period and receive single-blind placebo for the last 2 weeks if screening criteria are met. During Treatment Period 1, participants receive matched placebo to MK-6096 daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29, on which days they receive placebo 30 minutes before bedtime. Treatment Period 1 is followed by a 2-week washout period during which the participant receives single-blind placebo for the first 3 days and no treatment the remaining 11 days. During Treatment Period 2, participants receive MK-6096 10 mg daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29 (Study Days 44 and 72), on which days they receive MK-6096 30 minutes before bedtime. arm 7: Prior to Treatment Period 1, participants undergo a 3 week screening period and receive single-blind placebo for the last 2 weeks if screening criteria are met. During Treatment Period 1, participants receive MK-6096 20 mg daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory on Days 1 and 29 for 2 overnight PSG recordings, on which days they receive MK-6096 30 minutes before bedtime. Treatment Period 1 is followed by a 2-week washout period during which the participant receives single-blind placebo to MK-6096 for the first 3 days and no treatment the remaining 11 days. During Treatment Period 2, participants receive matched placebo to MK-6096 daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29 (Study Days 44 and 72), on which days they receive placebo 30 minutes before bedtime. arm 8: Prior to Treatment Period 1, participants undergo a 3 week screening period and receive single-blind placebo for the last 2 weeks if screening criteria are met. During Treatment Period 1, participants receive matched placebo to MK-6096 daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29, on which days they receive placebo 30 minutes before bedtime. Treatment Period 1 is followed by a 2-week washout period during which the participant receives single-blind placebo for the first 3 days and no treatment the remaining 11 days. During Treatment Period 2, participants receive MK-6096 20 mg daily for 4 weeks at 5-10 minutes before bedtime and return to the sleep laboratory for 2 overnight PSG recordings on Days 1 and 29 (Study Days 44 and 72), on which days they receive MK-6096 30 minutes before bedtime.

Interventions: intervention 1: MK-6096 intervention 2: Dose-matched Placebo to MK-6096
Intervention descriptions: intervention 1: MK-6096 2.5 mg or 5 mg tablets equaling 2.5 mg dose, 5 mg dose, 10 mg dose, or 20 mg dose (depending upon allocation) were taken daily before bedtime for 4 weeks. intervention 2: Dose-matched placebo tablets to MK-6096 were taken daily before bedtime during 2-week single-blind run-in, for 4 weeks as a treatment period, and during 2-week washout between treatment periods.

Protocol document: