7. Use of drugs, supplements, prescription or nonprescription, or food that have psychoactive properties. In the event of inadvertent use of such products during the 2 weeks prior to randomization, continued eligibility will be assessed on a case by case basis by the investigator and the medical monitor. In addition, following a discussion of the individual case between the medical monitor and the investigator, the medical monitor may allow minimal anxiolytic medication (for example a benzodiazepine) use for subjects who experience significant intolerable anxiety during the final week of the study (Days 64-71).