Treat current symptoms as the immediate priority
Call 911 for collapse, a seizure, abnormal breathing or inability to wake. For a suspected overdose without those signs, contact US Poison Help at 1-800-222-1222 promptly. Do not induce vomiting or assume the person can safely sleep it off. [1][2]
A fixed pill number cannot predict the outcome
Poison Control describes melatonin toxicity as often mild but does not provide a universal overdose threshold. Strength, formulation, other ingredients, co-ingestants and the person’s circumstances affect assessment. “Natural hormone” and a reassuring case report do not establish safety for a different exposure. [3][2]
Get help without waiting to solve the arithmetic
Tell the poison specialist the product, possible amount, timing, symptoms and other substances involved. If the ingestion was intentional, seek immediate medical help and stay with the person if it is safe to do so. This is a situation for direct care, not experimenting with an online threshold. [1][2]
An empty bottle leaves important questions unanswered
Imagine someone finds an empty container but does not know when its contents were taken. Report that uncertainty rather than converting the bottle size into a predicted outcome. Keep the packaging for the care team and follow its instructions. The useful next step is assessment, not a fatal-dose calculation. [2]
| Situation | Response |
|---|---|
| Severe symptoms | Emergency services |
| Possible excess ingestion | Poison specialist assessment |
| Uncertain amount | Report uncertainty and keep the package |
Sources for this article
- Poison Control: First aid guidelines
Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product. - Potential uses and benefits of melatonin | Poison Control
Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product. - Took too much melatonin? Effects and interactions | Poison Control
Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.