A Study of OPC-41061 Orally Disintegrating (OD) Tablets Using 2 Different Formulations and 2 Dosing Regimens in Healthy Adult Male Subjects

Inclusion Criteria: * Body weight of at least 50.0 kg * BMI \[body weight in kg / (height in m)2\] of at least 17.6 kg/m2 and less than 25.0 kg/m2 * Judged by the investigator or subinvestigator to be capable of providing written informed consent prior to the start of any trial-related procedures and capable of complying with the trial procedures for this study. Exclusion Criteria: * Judged by the investigator,subinvestigator, or sponsor to have a clinically significant abnormality in results of the screening examination (including a notable deviation from the site's standard values) or a medical history that could place the subject at risk or affect the evaluation of drug absorption, distribution, metabolism, or excretion * History of alcohol or drug dependence or abuse within 2 years prior to the trial * History or current infection with hepatitis or acquired immunodeficiency syndrome (AIDS) or carrier of hepatitis B positive surface antigen (HBsAg), anti-hepatitis C virus (HCV), human immunodeficiency virus (HIV), or syphilis based on the results of the Treponema pallidum (TP) antibody test or rapid plasma reagin (RPR) test * History of any severe drug allergy * Positive results in alcohol screening test or urine drug screening test at time of screening examination or trial site admission * Use of any other investigational medicinal product (IMP) within 120 days prior to Period 1 IMP administration * Consumption of any food or beverage containing St. John's wort within 14 days prior to Period 1 IMP administration * Consumption of any food or beverage containing grapefruit, Seville orange, or star fruit within 7 days prior to Period 1 IMP administration * Judgment by the investigator or subinvestigator that the subject should not participate in the study for any other reason.