Melatonin tablets are a popular natural supplement used to help regulate sleep patterns. They contain a hormone naturally produced in the body that helps regulate the sleep-wake cycle. Melatonin tablets have been used to help adjust sleep schedules, such as for jet lag or shift work, and to help people who have difficulty falling asleep or staying asleep. They also may be used to help seasonal affective disorder, a type of depression that is related to the changing of the seasons. Melatonin tablets usually are taken at bedtime. The recommended dose is generally 1 to 5 milligrams, although some people may need higher doses, up to 10 milligrams per day. The effects of melatonin tablets usually last about 8 hours. Side effects are generally mild and may include headache, dizziness, nausea, or sleepiness. Melatonin tablets are available without a prescription, but it's important to talk to your doctor before taking any supplement, in
cluding melatonin, to make sure it is appropriate and safe for you.