This study is an open-label, randomised, single dose study to determine the pharmacokinetics, safety and tolerability of 2 different formulations of orvepitant 60 mg and the effect of food in 15 Healthy Volunteers.

Orvepitant is a highly potent and selective neurokinin-1 (NK1) receptor antagonist currently in development for the treatment of depression and anxiety.

This study is an open-label, randomised, single dose study to determine the pharmacokinetics, safety and tolerability of 2 different formulations of orvepitant 60 mg and the effect of food in 15 Healthy Volunteers. According to a cross over design, in three different occasions, each subject will receive the "old" formulation of orvepitant in fasted condition and the "new" formulation in fasted condition and after a FDA High-Fat Breakfast. Subjects will be screened within 21 days of first treatment. On each dosing occasion, subjects will be admitted to the clinic on Day-1 and will remain until Day 2; they will be also asked to return to the site 48 and 72 hours after each dosing for the PK blood sample collection. The wash-out period between each dosing occasion will be at least 5 days and subjects will be asked to return to the site 7-14 days after the administration of the last dose of orvepitant for a follow-up visit.

Inclusion Criteria:

• Healthy male or female between 18 and 65 years of age inclusive.

• A female subject is eligible to participate if she is of either non-childbearing potential or child-bearing potential and agrees to use one of the contraception methods

• No co-morbid Psychiatric Disorders as defined using the Mini International Neuropsychiatric Interview (M.I.N.I) scale.

• A 12-lead ECG at screening showed no abnormalities that in the opinion of the Principal Investigator will compromise safety in this study.

  -- Body weight ≥ 50 kg and BMI within the range 19.0 - 29.9 kg/m2 (inclusive).

• Capable of giving written informed consent

Exclusion Criteria:

• As a result of any of the medical interview, physical examination or screening investigations the Physician Responsible considers the subject unfit for the study.
• The subject has a history of a drug or other allergy which in the opinion of the Physician Responsible contraindicates the participation in the study.
• Subjects with an unstable medical disorder or a disorder that would likely interfere with the action, absorption, distribution, metabolism or excretion of orvepitant, may pose a safety concern, or interfere with accurate assessment of safety.
• The subject has a current or recent (within six months) documented gastrointestinal disease; a history of malabsorption, oesophageal reflux, or irritable bowel syndrome; frequent (more than once a week) occurrence of heartburn, or any surgical intervention (e.g. cholecystectomy) which would be expected to influence the absorption of drugs.
• History of psychiatric illness
• Any history of a clinically significant abnormality of the neurological system (including dementia and other cognitive disorders or significant head injury) or any history of seizure (excluding febrile seizure).
• Subject is consuming alcool or tobacco
• Subject is positive to Hepatitis B, C or HIV