If you accidentally take melatonin during the day it may cause you to experience drowsiness and may cause you to fall asleep.
So if you did take some melatonin during the day you should avoid driving, operating machinery etc until the melatonin has time to wear off.
Melatonin is a hormone that naturally occurs in the body to help people sleep.
Although some people don't produce enough of the melatonin hormone which can cause them to have trouble sleeping so in those cases some people need to take melatonin supplements to help increase the amount of melatonin in their body.
Melatonin is a hormone primarily released by the pineal gland at night, and has long been associated with control of the sleep–wake cycle.
As a dietary supplement, it is often used for the short-term treatment of insomnia, such as from jet lag or shift work, and is typically taken orally.
Melatonin supplements typically begin to kick in between 20 minutes and two hours after ingestion, which is why taking one to three milligrams two hours before bedtime is a good idea.
Taking too much melatonin can actually cause rebound insomnia either rendering the supplement ineffective or worse, exacerbating your already sleepless nights further.
You only need tiny doses of melatonin to support your natural sleep cycle.