My mom got some and I'm wondering if it's safe to use. Is it actually effective? And are there any other issues associated with it?
http://www.mayoclinic.com/health/melatonin-side-effects/AN01717If you're considering taking melatonin supplements, check with your doctor first — especially if you have any health conditions. The correct dose depends on the intended use. For example, circadian rhythm sleep disorders are often treated with 0.5 milligrams of melatonin a day, while doses of 3 to 5 milligrams a day might be used to treat jet lag or reduce the time it takes to fall asleep. In addition, remember that melatonin is generally recommended only for short-term use — up to two months.