Conditions: Type 2 Diabetes Mellitus
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 118
Healthy volunteers: no

Brief summary:
This study assessed the safety and efficacy of MK-3577. The primary efficacy hypothesis was that, after 4 weeks of treatment, either the morning (AM) administration or the evening (PM) administration of MK-3577 provides superior reduction of 24-hour weighted mean glucose (WMG) levels compared to placebo (PLA). The primary safety hypothesis was that MK-3577 is well tolerated compared to placebo.

Detailed description:
This was a 4-period/5-treatment crossover study. Each period was 4 weeks. The 5 treatments consisted of MK-3577 10 mg once daily (QD) in the AM, MK-3577 6 mg QD in the evening (PM), MK-3577 25 mg twice daily (BID), metformin 1000 mg BID, and placebo to MK-3577/placebo to metformin. Participants were to be randomized to one of 14 treatment sequence arms. A subset of participants in each group was to domicile (stay overnight) at selected clinical sites at Baseline, Week 4 (end of Period 1), and Week 8 (end of Period 2) to undergo 24-hr blood sample.

Arms:
arm 1: Participants were to receive oral treatment with dose-matched placebo to MK-3577 for 4 weeks during Period 1, followed by MK-3577 10 mg QD AM for 4 weeks during Period 2, followed by MK-3577 6 mg QD PM for 4 weeks during Period 3, followed by MK-3577 25 mg BID for 4 weeks during Period 4. Domiciled participants were also to receive placebo to metformin during Period 1 and Period 2. arm 2: Participants were to receive oral treatment with MK-3577 10 mg QD AM for 4 weeks during Period 1, followed by dose-matched placebo to MK-3577 for 4 weeks during Period 2, followed by MK-3577 25 mg BID for 4 weeks during Period 3, followed by MK-3577 6 mg QD PM for 4 weeks during Period 4. Domiciled participants were also to receive placebo to metformin during Period 1 and Period 2. arm 3: Participants were to receive oral treatment with MK-3577 6 mg QD PM for 4 weeks during Period 1, followed MK- 3577 25 mg BID for 4 weeks during Period 2, followed by dose-matched placebo to MK-3577 for 4 weeks during Period 3, followed by MK-3577 10 mg QD AM for 4 weeks during Period 4. arm 4: Participants were to receive oral treatment with MK-3577 25 mg BID for 4 weeks during Period 1, followed by MK-3577 6 mg QD PM for 4 weeks during Period 2, followed by MK-3577 10 mg QD AM for 4 weeks during Period 3, followed by dose-matched placebo to MK-3577 for 4 weeks during Period 4. arm 5: Participants were to receive oral treatment with dose-matched placebo to MK-3577 for 4 weeks during Period 1, followed by MK-3577 25 mg BID for 4 weeks during Period 2, followed by MK-3577 10 mg QD AM for 4 weeks during Period 3, followed by MK-3577 6 mg QD PM for 4 weeks during Period 4. arm 6: Participants were to receive oral treatment with MK-3577 10 mg QD AM for 4 weeks during Period 1, followed by MK-3577 6 mg QD PM for 4 weeks during Period 2, followed by dose-matched placebo to MK-3577 for 4 weeks during Period 3, followed by MK-3577 25 mg BID for 4 weeks during Period 4. arm 7: Participants were to receive oral treatment with MK-3577 6 mg QD PM for 4 weeks during Period 1, followed by MK-3577 10 mg QD AM for 4 weeks during Period 2, followed by MK-3577 25 mg BID for 4 weeks during Period 3, followed by dose-matched placebo to MK-3577 for 4 weeks during Period 4. arm 8: Participants were to receive oral treatment with MK-3577 25 mg BID for 4 weeks during Period 1, followed by dose-matched placebo to MK-3577 for 4 weeks during Period 2, followed by MK-3577 6 mg QD PM for 4 weeks during Period 3, followed by MK-3577 10 mg QD AM for 4 weeks during Period 4. arm 9: Participants were to receive oral treatment with dose-matched placebo to MK-3577 for 4 weeks during Period 1, followed by MK-3577 6 mg QD PM for 4 weeks during Period 2, followed by MK-3577 25 mg BID for 4 weeks during Period 3, followed by MK-3577 10 mg QD AM for 4 weeks during period 4. Domiciled participants were also to receive placebo to metformin during Period 1 and Period 2. arm 10: Participants were to receive oral treatment with MK-3577 10 mg QD AM for 4 weeks during Period 1, followed by MK-3577 25 mg BID for 4 weeks during Period 2, followed by MK-3577 6 mg QD PM for 4 weeks during Period 3, followed by dose-matched placebo to MK-3577 for 4 weeks during Period 4. arm 11: Participants were to receive oral treatment with MK-3577 6 mg QD PM for 4 weeks during Period 1, followed by dose-matched placebo to MK-3577 for 4 weeks during Period 2, followed by MK-3577 10 mg QD AM for 4 weeks during Period 3, followed by MK-3577 25 mg BID for 4 weeks during Period 4. Domiciled participants were also to receive placebo to metformin during Period 1 and Period 2. arm 12: Participants were to receive oral treatment with MK-3577 25 mg BID for 4 weeks during Period 1, followed by MK-3577 10 mg QD AM for 4 weeks during Period 2, followed by dose-matched placebo to MK-3577 for 4 weeks during Period 3, followed by MK-3577 6 mg QD PM for 4 weeks during Period 4. arm 13: Domiciled participants were to receive oral treatment with dose-matched placebo to metformin (METF) for 4 weeks during Period 1, followed by metformin 1000 mg BID for 4 weeks during Period 2, followed by MK-3577 10 mg QD AM for 4 weeks during Period 3, followed by MK-3577 6 mg QD PM for 4 weeks during Period 4. Participants in this arm were administered metformin placebo during Period 1 and active metformin during Period 2. arm 14: Domiciled participants were to receive oral treatment with metformin 1000 mg BID for 4 weeks during Period 1, followed by dose-matched placebo to metformin for 4 weeks during Period 2, followed by MK-3577 6 mg QD PM for 4 weeks during Period 3, followed by MK-3577 10 mg QD AM for 4 weeks during Period 4. Participants in this arm were administered active metformin during Period 1 and metformin placebo during Period 2.

Interventions: intervention 1: MK-3577 intervention 2: Placebo to MK-3577 intervention 3: Metformin intervention 4: Placebo to Metformin
Intervention descriptions: intervention 1: MK-3577 oral tablets totaling 6 mg in the evening (PM), 10 mg in the morning (AM), or 25 mg twice daily (BID) depending upon randomization, administered during a 4 week treatment period. intervention 2: Dose-matched placebo tablets to MK-3577 administered during a 4 week treatment period intervention 3: Two 500 mg tablets of metformin were administered twice daily (2000 mg total daily dose) to domiciled participants during a 4 week treatment period. intervention 4: Two placebo tablets to metformin were administered twice daily (2000 mg total daily dose) to domiciled participants during a 4 week treatment period.

Protocol document: