Eight planned dose levels of ODM-106 will be compared with placebo.There will be 2 panels of subjects with 4 dose levels in each panel. Subjects will be randomised to receive 3 dose levels of active treatment (single doses) and 1 dose of placebo. The dose levels will be escalated from the smallest dose upwards within the study and within the study subject. A third panel of 8 subjects may be included to investigate further dose levels of ODM-106, investigate the effect of taking ODM-106 with food or to compare two different formulations of ODM-106. For an individual subject, the study will consist of a screening period (maximum 4 weeks), 4 study treatment periods with a wash-out period between each study treatment administration and a post-treatment period of about 2 weeks.~The study duration for an individual will be approximately 12-16 weeks. Blood samples will be collected for the assessment of the concentration of ODM-106 and its metabolite.Plasma samples and cumulative urinary samples will be collected for metabolite screening. Safety will be assessed by a 12-lead electrocardiogram (ECG), continuous ECG monitoring, Holter ECG, supine and orthostatic blood pressure and heart rate, body temperature, physical examination, electroencephalogram (EEG), laboratory safety assessments and adverse events. Sedation and psychomotor tests and a quantitative EEG will also be performed.
The study is a dose escalation study with 8 planned dose levels. The study is a 4-period crossover design where each healthy volunteer will be randomised to receive three dose levels of ODM-106 (single doses) and one dose of placebo. The study will look at the pharmacokinetics (how the body handles the drug) and pharmacodynamics (how the drug affects the body) of ODM-106.