Single-centre, open-label, randomised, gender-balanced, 3-way crossover, 3-period, 3-sequence study in 18 healthy male and female subjects.

Single-centre, open-label, randomised, gender-balanced, 3-way crossover, 3-period, 3-sequence study in 18 healthy male and female subjects. The study consisted of 3 periods separated by a washout of 7 days or more between doses. Subjects received a single oral 800 mg dose of eslicarbazepine acetate following a standard meal in one period, and following at least 10 hours of fasting in two periods.

Inclusion Criteria:

• Male or female subjects aged between 18 and 55 years, inclusive.
• Subjects of body mass index (BMI, kg/m2) within the normal range [4], i.e., between 18.50 and 24.99, inclusive.
• Subjects who were healthy as determined by pre-study medical history, physical examination, vital signs, and 12-lead ECG.
• Subjects who had clinical laboratory test results clinically acceptable at screening and admission to first treatment period.
• Subjects who had negative tests for HBsAg, anti-HCVAb and anti- HIV-1 and HIV-2 Ab at screening.
• Subjects who had a negative screen for alcohol and drugs of abuse at screening.
• Subjects who were non-smokers or ex-smokers who discontinued smoking at least 3 months prior to admission.
• Subjects who were able and willing to give written informed consent.
• (If female) She was not of childbearing potential by reason of surgery (hysterectomy or tubal ligation) or, if of childbearing potential, she used one of the following methods of contraception: intrauterine device (by the study subject) + condom (by the partner), diaphragm (by the study subject) + condom (by the partner), or spermicide (by the study subject) + condom (by the partner).
• (If female) She had a negative urine pregnancy test at screening and admission to each treatment period.

Exclusion Criteria:

• Subjects who did not conform to the above inclusion criteria, or
• Subjects who had a clinically relevant history or presence of respiratory, gastrointestinal, renal, hepatic, haematological, lymphatic, neurological, cardiovascular, psychiatric, musculoskeletal, genitourinary, immunological, dermatological, endocrine, 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 drug hypersensitivity.
• Subjects who had a history of alcoholism or drug abuse.
• Subjects who consumed more than 14 units of alcohol a week.
• Subjects who used medicines within 2 weeks of first admission that, in the opinion of the investigator, may affect the safety or other study assessments.
• Subjects who used any investigational drug or participated in any clinical trial within 2 months of their first admission.
• Subjects who had previously received eslicarbazepine acetate (ESL, BIA 2-093).
• Subjects who donated or received any blood or blood products within the previous 2 months prior to screening.
• Subjects who were vegetarians, vegans or have 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.
• (If female) She was pregnant or breast-feeding.
• (If female) She was of childbearing potential and she did not used and approved effective contraceptive method or she used oral contraceptives.