Clinical Pharmacology Study of Oral Edaravone in Healthy Adult Males (Drug Interaction Study and Preliminary Regimen-Finding Study)

Inclusion criteria

• Healthy adult male volunteers
• Cohort 1: Japanese, Cohort 2: Japanese or Caucasian
• Subjects aged between 20 and 45 years at the time of informed consent
• Subjects who have thoroughly understood the contents of the study and voluntarily provided written informed consent to participate in the study

Exclusion criteria

Additional screening criteria check may apply for qualification:

• Subjects with a current or previous history of cardiac, hepatic, renal, gastrointestinal, respiratory, psychiatric/nervous, hematopoietic, or endocrine diseases, and those whom the investigator (or subinvestigator) deems unsuitable for the study
• Body mass index (BMI) of <18.0 or >30.0, or body weight of <50 kg (BMI formula: body weight [kg]/height [m]2, rounded to one decimal place)
• Subjects who have undergone any surgery known to affect the gastrointestinal absorption of drugs
• Subjects who do not agree to use an effective method of contraception from initiation of study drug administration to 14 days after completion (discontinuation) of study drug administration
• Subjects who have previously received edaravone
• Subjects who have participated in another clinical study and received a study drug within 12 weeks before providing informed consent
• Use of any drug(s) other than the study drug or as-needed use of acetylsalicylic acid within 7 days before the initiation of study drug or victim drug administration
• Use of any alcohol, xanthine, or caffeine-containing product(s) within 24 hours before screening and Day -1 visiting
• Use of any supplement(s) within 7 days before the initiation of study drug or victim drug administration
• Use of grapefruit, grapefruit juice, or any processed food(s) containing these substances during the following periods (Cohort 1: within 7 days before the initiation of victim drug administration, Cohort 2: within 24 hours before each Day -1 visiting)
• Use of any tobacco or nicotine-containing product(s) (Cohort 1: within 12 weeks before the initiation of victim drug administration during the following periods, Cohort 2: within 24 hours before each Day -1 visiting)
• Use of any health food(s) containing St John's Wort (Hypericum perforatum) within 2 weeks before the initiation of victim drug administration (only in Cohort 1)