A Double-blind, Randomised, Placebo-controlled, Rising Multiple Dose Study to Investigate the Safety, Tolerability, Steady State Pharmacokinetic Profile and CNS Effects of BIA 2-093

The purpose of this study is to investigate the safety and tolerability of multiple dose regimens of BIA 2-093 in healthy young male volunteers

Single centre, Phase I, double-blind, randomised, placebo-controlled study investigating 4 multiple rising oral doses of BIA 2-093 in 4 groups of 8 young healthy male subjects. Within each group, 2 subjects were randomised to receive placebo and the remaining 6 subjects to receive BIA 2-093. No subject was a member of more than one group. The dose regimens investigated were: 200 mg b.i.d.(twice daily), 400 mg o.d.(once daily; this was changed from 400 mg b.i.d. in protocol amendment 1, on the basis of interim pharmacokinetic analysis of Group 1 data), 800 mg o.d, and 1200 mg o.d. BIA 2-093/placebo was administered orally once daily on Days 1-8, or twice a day (at 12-hour intervals) on Days 1-7 with a final dose in the morning of Day 8. The multiple dose regimens were to be investigated in ascending order. Progression to each higher dose level was only to occur if the previous dose level was deemed by the investigator and the sponsor to be safe and well tolerated.