This was a Phase 1, single-center, open-label, absorption, distribution, metabolism, and excretion study in 8 healthy adult male subjects. Subjects received a single oral dose of 400 mg BIA 5-1058, containing approximately 3.7 MBq (0.08 milliSievert [mSv]) of 14C-BIA 5-1058 as oral capsules. Screening was between Day -21 and Day -2 and confinement period was of one period in the clinic involving drug administration on Day 1, with admission on Day 1 and discharge on Day 15 (336 hours post-dose).
the purpose of this study is:~to determine the rate and routes of excretion of BIA 5-1058 and the mass balance in urine, feces and exhaled air, after a single oral dose of 400 mg 14C labeled BIA 5 1058 containing 3.7 Megabecquerel (MBq) of radiocarbon;~to determine the pharmacokinetics (PK) of total radioactivity (TRA) in plasma and whole blood and to assess the blood-to-plasma ratio;~to determine the PK of BIA 5-1058 and its metabolites in plasma.