List of NDC products with proprietary name melatonin. Melatonin has been used for short-term treatment of trouble sleeping (insomnia) due to sleep cycle disorders and time changes (jet lag). This product may help you fall asleep faster and decrease the number of times you awaken during the night. It may also help you sleep for a longer time. Melatonin is a substance that your body normally makes. It is thought to help your body's regular daily cycle, hormone production, and sleep patterns. Some herbal/diet supplement products have been found to contain possibly harmful impurities/additives. Check with your pharmacist for more details regarding the particular brand you use. The FDA has not reviewed this product for safety or effectiveness. Consult your doctor or pharmacist for more details.