- Evidence suggests that melatonin is not effective in treating most primary sleep disorders with short-term use, although there is some evidence to suggest that melatonin is effective in treating delayed sleep phase syndrome with short-term use.
- Evidence suggests that melatonin is not effective in treating most secondary sleep disorders with short-term use.
- No evidence suggests that melatonin is effective in alleviating the sleep disturbance aspect of jet lag and shift-work disorder.
- Evidence suggests that melatonin is safe with short-term use.