It is generally considered safe to take melatonin every night for a short period, typically one to two months, but the long-term safety of nightly melatonin use is not well studied. Most experts recommend using melatonin as a short-term aid and focusing on good sleep practices before relying on supplements. Side effects may include drowsiness, headaches, dizziness, nausea, vivid dreams, and other mild symptoms. Because melatonin is a hormone, prolonged use might affect natural melatonin production and hormonal processes, though concrete evidence is limited. It is also advised to consult a healthcare provider before beginning nightly melatonin, especially to address any underlying reasons for poor sleep and to avoid interactions with medications or medical conditions. Thus, while short-term nightly use is usually safe, long-term daily use should be approached cautiously and under medical supervision.
