The purpose of this study is to investigate the effect of food on the pharmacokinetics of a single 800 mg oral dose of BIA 2-093 in healthy volunteers.

Single centre, open label, randomized, two-way crossover study in 12 healthy male volunteers. The study consisted of 2 periods separated by a washout period of 14 days or more. On each of the study periods the volunteers received a single 800 mg oral dose of BIA 2-093 following either a standard high fat content breakfast or 10 hours of fasting.

Inclusion Criteria:

Subjects were eligible for entry into the study if they fulfilled the following inclusion criteria:

• Male subjects aged between 18 and 45 years, inclusive.
• Subjects of body mass index (BMI) between 19 and 28 kg/m2, inclusive.
• Subjects who were healthy as determined by pre study medical history, physical examination, neurological examination, EEG, and 12-lead ECG.
• Subjects who had clinical laboratory tests clinically acceptable to the investigator.
• Subjects who were negative for HBsAg, anti-HCV Ab and HIV-1 and HIV-2 Ab tests at screening.
• Subjects who were negative for alcohol and drugs of abuse at screening and admission.
• Subjects who were non-smokers or who smoked less than 10 cigarettes or equivalent per day.
• Subjects who were able and willing to give written informed consent.

Exclusion Criteria:

• Subjects who did not conform to the above inclusion criteria.
• Subjects who had a clinically relevant history or presence of respiratory, gastrointestinal, renal, hepatic, haematological, lymphatic, neurological, cardiovascular, psychiatric, musculoskeletal, genitourinary, immunological, dermatological, connective tissue diseases or disorders.
• Subjects who had a clinically relevant surgical history.
• Subjects who had a clinically relevant family history.
• Subjects who had a history of relevant atopy.
• Subjects who had a history of relevant drug hypersensitivity.
• Subjects who had a history of alcoholism or drug abuse.
• Subjects who consumed more than 21 units of alcohol a week.
• Subjects who had a significant infection or known inflammatory process on screening and/or admission.
• Subjects who had acute gastrointestinal symptoms at the time of screening and/or admission (e.g., nausea, vomiting, diarrhoea, heartburn).
• Subjects who had an acute infection such as influenza at the time of screening and/or admission.
• Subjects who had used prescription drugs within four weeks of first dosing.
• Subjects who had used over-the-counter medication excluding oral routine vitamins but including mega dose vitamin therapy within one week of first dosing.
• Subjects who had used any investigational drug and/or participated in any clinical trial within two months of their first admission to this study.
• Subjects who had previously received BIA 2-093.
• Subjects who had donated and/or received any blood or blood products within the previous two months prior to screening.
• Subjects who were vegetarians, vegans and/or had medical dietary restrictions.
• Subjects who could not communicate reliably with the investigator.
• Subjects who were unlikely to co-operate with the requirements of the study.
• Subjects who were unwilling or unable to give written informed consent.