- 2025-12
- Drugs in R&D 25(4)
- Xuening Li
- Hui Li
- Hongrong Xu
- Fei Yuan
- Hanjing Chen
- Chao Liu
- Mengjie Yang
- Jing Li
- Lei Sheng
Study Design
- Type
- Randomized Controlled Trial (RCT)
- Sample size
- n = 20
- Population
- 50 healthy Chinese participants
- Methods
- Phase I study, multiple oral doses at 25 mg twice daily, followed by titration to either 37.5 or 50 mg twice daily; randomized into three groups
- Blinding
- Double-blind
- Duration
- two periods (period 1 and period 2); days 8 and 34 mentioned
Background and objectives
This phase I study was designed to evaluate the safety, tolerability, and pharmacokinetics of omecamtiv mecarbil with multiple oral doses at 25 mg twice daily, followed by titration to either 37.5 or 50 mg twice daily in healthy Chinese participants.Methods
Fifty healthy participants were enrolled and randomly assigned into three groups: Group A (20 subjects) received omecamtiv mecarbil 25 mg in period 1 and either 37.5 mg or 25 mg in period 2; Group B (20 subjects) received omecamtiv mecarbil 25 mg in period 1 and either 50 mg or 25 mg in period 2; and Group C (10 subjects) received a placebo in both periods.Results
The pharmacokinetics of omecamtiv mecarbil were well characterized in healthy Chinese participants. Across all subgroups, the mean terminal elimination half-life ranged from 18.3 to 21.3 h. Mean accumulation ratios of area under the curve from time 0 to 12 h ranged from 4.54 to 5.01 in period 1 and 2. The mean maximum observed concentration/plasma concentration before dosing ratios varied between 1.23 and 1.31 on days 8 and 34 across subgroups. No subjects experienced serious adverse events. The most frequently reported adverse events were an increased blood creatine kinase levels (12.5% of subjects in the omecamtiv mecarbil group, 10% in the placebo group), increased blood glucose levels (7.5%, 0), and bradycardia (10%, 0).Conclusions
Omecamtiv mecarbil was well tolerated at the dose levels of 25-50 mg in healthy Chinese participants according to a pharmacokinetic-based titration scheme. Exposure of omecamtiv mecarbil was dose proportional, and no dose-related trends were observed in treatment-emergent adverse events.