Healthline interviews experts on wether or not is it safe for consumers to take melatonin supplements every night for insomnia.
Both Dr. Peters-Mathews and Dr. Malow believe melatonin is generally safe to take every night, but large studies are needed to determine whether it’s effective and safe for all forms of insomnia and particularly for long-term use. “Melatonin is used safely by most people for years,” says Dr. Peters-Mathews.
Dr. Peters-Mathews recommends sticking to lower doses (1 to 3 milligrams per nightly dose) of melatonin to prevent unwanted side effects, which typically include increased dreaming, nightmares, or morning sleepiness. If you are bothered by these side effects, you should stop taking melatonin and speak to your doctor about alternatives.