While melatonin is generally considered safe and is commonly used as a sleep aid, taking it in excessively high doses may lead to adverse effects. However, there is limited evidence to suggest that taking large quantities of melatonin could be fatal. Most side effects are mild and can include drowsiness, headaches, dizziness, or stomach upset.
That said, individual responses to melatonin can vary widely, and some people may experience more severe reactions. It's also important to note that taking large amounts of melatonin can lead to disruptions in the body's natural sleep-wake cycle.
If you or someone else is considering taking melatonin or is experiencing adverse effects from it, it's wise to consult a healthcare professional for guidance. Always follow recommended dosages and seek medical advice for any concerns about sleep aids.