Food Effect and Dosage Form Proportionality Study of Eslicarbazepine Acetate

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.