How many melatonin it takes to knock someone out?

The appropriate dosage of melatonin varies from person to person, but typical doses range from 0.5 to 5 milligrams taken about 30 minutes before bedtime. Higher doses, such as 10 milligrams or more, are sometimes used, but they can lead to side effects and are not necessarily more effective. It's important to consult a healthcare professional before using melatonin, as individual needs and responses can differ significantly. Melatonin is a supplement, not a sedative, and its effects can vary widely based on factors like age, body weight, and sleep disorders.