There's no treatment for jet lag
Medicines aren't usually needed for jet lag.
Symptoms often improve after a few days as your body clock adjusts to the new time zone.
Sleeping tablets may be helpful if you're having problems sleeping (insomnia). They can be addictive so should only be used for a short time and if symptoms are severe.
Melatonin is a chemical released by the body in the evening to let your brain know it's time to sleep. Melatonin supplements aren't recommended for jet lag because there isn't enough evidence that they work.