RecruitingPhase 4Clinical trialA SMART Approach to Evaluating the Benefits of Common Prescription and OTC Medications for InsomniaThe purpose of this study is to assess the relative effectiveness, safety, and durability of the most commonly used prescription (zolpidem, trazodone) and over-the-counter (OTC) (melatonin, diphenhydramine) medications for insomnia, as well as a less commonly used prescription that may have a better risk/benefit profile (doxepin).