Melatonin 3mg capsules is used to help overcome the symptoms of jetlag.
Before flying from one time zone to another, ie. West (eg. London) to East (eg. Singapore) or vice versa, start taking one capsule of melatonin 3mg, half an hour before sleeping, for 3 consecutive nights before flying. After reaching your destination, take the same dose for another 3 nights. The symptoms of jetlag is usually more severe when travelling from West to East.