While melatonin is generally considered safe for short-term use, research has identified several possible side effects:
- Common side effects: Headache, dizziness, daytime sleepiness
- Less common effects: Nausea, mild anxiety, temporary depression
- Rare side effects: Vivid dreams, nightmares, mild tremor
Long-term effects are still being studied. Evidence suggests that melatonin may interact with certain medications, including blood thinners and diabetes medications. It’s important to consult with a healthcare provider before starting melatonin, especially if you have existing medical conditions or take other medications.
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Last Updated: August 18, 2025
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