Effect of Food on Opicapone

The purpose of this study is to investigate the effect of food on the catechol-O-Methyltransferase (COMT) activity after repeated doses of opicapone (OPC, development code BIA 9-1067) in healthy subjects and to characterize the effects of food on the pharmacokinetics (PK) and tolerability of OPC after repeated doses.

Single-centre, open-label, single-arm study in 28 healthy subjects. Subjects received a single-dose of 50 mg OPC once-daily (QD) in the evening for 12 days. On Day 1 (D1), 50 mg OPC was orally administered in the evening (reference hour for all other administrations) after a minimum of 6 hours fast. From D2 to D8 subjects were in ambulatory and received 50 mg OPC once-daily (evening administration after 2 hours fast). On D9, 50 mg OPC was orally administered in the evening after a minimum of 6 hours fast. On D10, 50 mg OPC was orally administered in the evening, thirty minutes after the start of a moderate meal (with a previous 6 hours fast). On D11 and D12 subjects received the last doses of 50 mg OPC (evening administration after 2 hours fast).

Eligibility Criteria:
Inclusion Criteria:

* Able and willing to give written informed consent and to comply with the study restrictions.
* Male or female subjects aged between 18 and 45 years, inclusive.
* Body mass index (BMI) between 19 and 30 kg/m2, inclusive.
* Healthy as determined by pre-study medical history, physical examination, vital signs, complete neurological examination and 12-lead ECG.
* Negative tests for HBsAg, anti-HCV Ab and HIV-1 and HIV-2 Ab at screening.
* Clinical laboratory test results clinically acceptable at screening and admission.
* Negative screen for alcohol and drugs of abuse at screening and admission.
* Non-smokers or ex-smokers for at least 3 months.
* If female:
* Not of childbearing potential by reason of surgery or, if of childbearing potential, she uses an effective non-hormonal method of contraception (intrauterine device or intrauterine system; condom or occlusive cap \[diaphragm or cervical or vault caps\] with spermicidal foam or gel or film or cream or suppository; true abstinence; or vasectomized male partner, provided that he is the sole partner of that subject) for all the duration of the study.
* Negative serum pregnancy test at screening and a negative urine pregnancy test on admission.

Exclusion Criteria:

* 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.
* Clinically relevant surgical history.
* Clinically relevant abnormality in the coagulation tests.
* Clinically relevant abnormality in the liver function tests.
* History of relevant atopy or drug hypersensitivity, particularly to any COMT inhibitor.
* History of alcoholism or drug abuse.
* Consume more than 14 units of alcohol a week.
* Significant infection or known inflammatory process at screening or admission.
* Acute gastrointestinal symptoms (e.g., nausea, vomiting, diarrhoea, heartburn) at the time of screening or admission.
* Used medicines within 2 weeks of admission that may affect the safety or other study assessments, in the investigator's opinion.
* Previously received OPC.
* Used any investigational drug or participated in any clinical trial within 90 days prior to screening.
* Participated in more than 2 clinical trials within the 12 months prior to screening.
* Donated or received any blood or blood products within the 3 months prior to screening.
* Vegetarians, vegans or have medical dietary restrictions.
* Cannot communicate reliably with the investigator.
* Unlikely to co-operate with the requirements of the study.
* If female:
* Pregnant or breast-feeding.
* Of childbearing potential and not used an approved effective contraceptive method or she uses oral contraceptives.