Human: I'm having trouble sleeping and have noticed that I wake up in the middle of the night. Is there anything I can take that will help me sleep better? Assistant: 
Yes, you might consider taking melatonin before bed to help you get a better night's sleep. It is an over-the-counter supplement that helps regulate your circadian rhythm, which is the body’s natural sleep-wake cycle. Melatonin supplements are available in many forms including capsules, tablets, and sublingual sprays.