Exclusion Criteria: Positive urine drug screen for opioids, cocaine, or amphetamine (excluding THC), dependence on other drugs excluding alcohol/nicotine/cannabis over the past year, unstable psychiatric, medical disorders, cataracts [posterior capsular/ nuclear (grade NS3 or more), currently on any maintenance psychotropic medications affecting sleep, currently pregnant, nursing, or not using a reliable method of contraception; history of hypersensitivity to antipsychotic drugs, including quetiapine, severe cognitive impairment, severe untreated obstructive sleep apnea, and inadequately controlled diabetes mellitus.