Study Evaluating The Potential Interaction Between Verapamil Immediate Release And SAM-531 When Co-Administered

Inclusion criteria : 1. Body mass index in the range of 18 to 30 kg/m2 and body weight greater than 50 kg. 2. Healthy as determined by the investigator on the basis of medical history, physical examination findings, clinical laboratory test results, vital sign measurements, and digital 12-lead ECG readings. Exclusion criteria : 1. Presence or history of any disorder that may prevent the successful completion of the study. 2. Any significant cardiovascular, hepatic, renal, respiratory, gastrointestinal (GI), endocrine, immunologic, dermatologic, hematologic, neurologic, or psychiatric disease.