The drug being tested in this study is called TAK-063. TAK-063 is was tested to estimate phosphodiesterase10A (PDE10A) occupancy in the brain following a single dose of TAK-063. This study used positron emission tomography (PET) scans to look at changes in the volume of tissue distribution before and after TAK-063 administration to calculate PDE10A occupancy in the brain.~The study enrolled 13 participants. Participants were assigned to a treatment group based on an enrollment schedule. The first 4 participants were assigned to the Pilot Cohort and received one dose of TAK-063 30 mg or 1000 mg tablets. The remaining participants were enrolled into the Main Cohort and received one dose of TAK-063 at 3, 10, 30 or 100 mg. Participants in both cohorts also received 3 separate intravenous infusions of [^11C]T-773 <8 μg; 400MBq ± 10% followed by a PET scan.~This single-centre trial was conducted in Sweden. The overall time to participate in this study was 46 days. Participants made 3 visits to the clinic, including one 3-day period of confinement to the clinic. Participants were contacted by phone on Day 16 for follow-up safety assessments.
The purpose of this study is to estimate phosphodiesterase 10A (PDE10A) occupancy in brain following a single dose of TAK-063.