I want to warn you for the side effects of Melatonin. I first thought it was a kind of vitamin with no side effects. I took 1 pill of 5 mg Melatonin for a few weeks. I have 3 side effects that is mentioned here: feeling cold, hives and a change of the bio ritme. I sleep 2 hours later than before and wake up 2 hours later. It takes me more than 1 hour to fall in sleep and I wake up a few times during the night and the early monring. When I have to get out of bed I am very tired and feeling cold the whole day.
Warnings:
Before taking melatonin, tell your doctor if you are pregnant or breastfeeding
Make sure your doctor knows if you have liver disease, are depressed, or have an autoimmune problem (such as arthritis or lupus). Also tell your doctor if you have seizures or other problems with your nervous system (2,7,12,20).
Side Effects:
Call your doctor right away if you have any of these side effects:
Allergic reaction: Itching or hives, swelling in your face or hand, swelling or tingling in your mouth or throat, chest tightness, trouble breathing, or rash
Unusual thoughts or behaviors (4,5,7)
Other Side Effects:
You may have the following side effects, but this medicine may also cause other side effects. Tell your doctor if you have side effects that you think are caused by this medicine.
Tiredness, change in sleep patterns (2,4,5,15,16,18)
Feeling cold (4,14)
Feeling very tired the next day (20)
Headache, confusion (4,5,17,18,19)
Sources:
https://www.allinahealth.org/CCS/doc/Thomson%20Alternative%20Medicine/48/10120.htmhttps://www.ncbi.nlm.nih.gov/pubmed/8127888(These side effects are also in the package leaflet)
This Dutch article says that when you take more than 3 mg you will have Melantonin also during the morning and afternoon. In the artcicle above you can read that Melaronin brings the body temperature down.
https://www.volkskrant.nl/de-gids/ga-je-beter-slapen-van-een-melatoninepil-~b3a7db5d/