- Is taking, or plans to take, one or more of the following medications (non-inclusive), within the 2 weeks prior to screening and throughout the course of the study: Centrally acting anticholinergics or antihistamines; Melatonin; Anticonvulsants; Antipsychotics; Anxiolytics; Benzodiazepines; Hypnotics; Any CNS depressants; Over-the-counter medications that could affect sleep; Stimulants; Diet pills; Anti-depressants; Disulfiram;