Melatonine/Melatonin 99% powder C13H16N2O2 Senwayer

Melatonin has been used for short-term treatment of trouble sleeping due to sleep cycle disorders and time changes.

Melatonin is most commonly used to:

help decrease jet lag
adjust sleep cycles in the blind (non 24-Hour Sleep Wake Disorder, or Non-24)
treat shift-work sleep disorders in people with alternating work schedules
for general insomnias

Melatonin is considered an effective treatment for jet lag and can aid sleep during times when you would not normally be awake.

Effective starting doses of melatonin for jet lag range from 0.3 to 0.5 mg. One milligram tablets can be cut in half to achieve a 0.5 mg dose of melatonin if smaller doses are not available for purchase. Higher doses are commonly marketed in the U.S. (up to 10 mg), but higher doses may be associated with more side effects such as headache, next day grogginess, or vivid dreams. Side effects of melatonin may be worse in older adults.

Always start with the lowest dose. According to a Cochrane review, doses over 5 mg appear to be no more effective than lower doses. Higher doses may result in excessively high levels of physiologic melatonin.

The most common melatonin side effect in children is morning drowsiness. Other common side effects in children include:

Bedwetting
Headache
Dizziness
Nausea
Diarrhea
Possible increased risk for seizures in children with severe neurological disorders.
Dietary melatonin supplements can still have drug interactions or health risks if you have certain medical conditions, upcoming surgery, or other health concerns.