A phase I, randomised, double-blind, placebo controlled, dose ranging study to evaluate the safety, tolerability and pharmacokinetics of EMA401 following multiple oral dosing in healthy male subjects.

Exclusion Criteria1

• Have received or is anticipated to receive a new prescription systemic or topical medication within 14 days prior to the start of dosing or an over–the-counter medicine 48 hours prior to the start of dosing. Any condition that would interfere with drug absorption (e.g. chronic diarrhoea). Abnormal laboratory test results deemed clinically significant within 21 days before enrolment including anaemia (haemoglobin less than 11.0 g/decilitre), neutropenia, thrombocytopenia and elevated liver function test results [including aspartate transaminase (AST) and alanine aminotransferase (ALT)] more than 1.5 times the upper limit of normal. Males known to have experienced elevated liver enzymes or altered white cell counts in any previous clinical study. Evidence of significant renal insufficiency, as indicated by an estimated creatinine clearance using the Cockcroft-Gault formula of less than 75 mL/min at Screening. As a result of medical review, physical examination (including height and weight) or screening investigations, the Medical Officer considers the subject unfit for the study. Known history of lactose intolerance or allergy to milk products. Positive urine drug test or alcohol breath test. Use of macrolide antibiotics (eg. Erythromycin), azole antifungal agents (eg.Ketoconazole) within 30 days of study dosing. History or clinical evidence of oral, cardiovascular, cerebrovascular, haematological, gastrointestinal, hepatic, renal, endocrine, pulmonary, neurological, psychiatric or skin disorder. History of epilepsy. History or clinical evidence of significant cardiovascular disease. Acute therapy for a serious infection within 30 days of study entry. History of significant drug allergies or significant allergic reaction or currently suffers from clinically significant systemic allergic disease. Positive Screening test for Hepatitis B surface antigen or Hepatitis C antibody and HIV (human immunodeficiency virus). Have participated in a clinical trial or have received an experimental therapy within 30 days or 10 half-lives of the drug, whichever is the longer, prior to dosing. Receipt of blood or blood products, or loss or donation of 450 mL or more of blood within 90 days before the first dose administration. Males who regularly drink more than four (4) units of alcohol daily (1 unit = 300 mL beer, 1 glass wine, 1 measure spirit). Any subject who has previously enrolled in this or any clinical trial of EMA401.