4. The patient has a Clinical Global Impression of Severity of Disease (CGI-S) rating of 4 or more. (For patients with OSAHS, the CGI-S scale will be administered after nCPAP effectiveness and regular usage is established. For patients with narcolepsy or OSAHS, CGI-S will be evaluated to assess general clinical condition. For patients with SWSD, CGI-S will be evaluated to assess sleepiness during the night shift including the commute to and from work.)