Clinical Study on Histamine H3 Receptor Occupancy of TS-091 by PET Examination in Healthy Adult Subjects

Inclusion Criteria: Subjects who met all of the following criteria. * Age: between ≥20 years and \<40 years at the time of providing written consent for participation in the study. * Body mass index (BMI): ≥18.5 and \<25.0 on the day of screening test. * Subject who received a prior explanation on the study and was able to understand its content and capable of providing voluntary written consent for participation in the study. * Other protocol defined inclusion criteria could apply- Exclusion Criteria: Subjects who came under any of the following exclusion criteria. * Subjects who were considered to have some disease and not healthy by the investigator or subinvestigator according to his medical judgment based on the results of screening test * Subjects with a drug or food allergy or a history thereof. * Subjects with a significant allergic disposition (e.g. asthma requiring treatment) or a history thereof. * Subjects with a history of heparin-induced thrombocytopenia. * Other protocol defined exclusion criteria could apply