Subject characteristics
All subjects in the study were male, and there were no notable differences in subject characteristics between the compared experimental groups in all parts. In Part A, the mean age range for Japanese and White healthy adults was 24.7–27.1 and 28.5–30.4 years, respectively, and 69.0–70.0 years for Japanese elderly. The mean BMI range was 20.6–22.3 kg/mDemographic and baseline information (safety analysis population).Abbreviations: BMI, body mass index; mg, milligram; 3‐way crossover design. Subjects were randomized into one of three groups based on a 3 × 3 Latin square design to receive zuranolone 10 mg, zuranolone 30 mg, or placebo.