There is no established melatonin withdrawal syndrome. Searching the clinical literature for one turns up studies of alcohol and prescription sleep drugs, not melatonin. What people describe when they stop is usually the sleep problem that sent them to melatonin in the first place, arriving all at once, plus the unsettled feeling of dropping a bedtime routine.
That is worth knowing before you stop, because it changes what you prepare for. If the original problem is still there, stopping will surface it. This page describes what people commonly report and what the evidence does and does not say about it. It is not a tapering schedule, and how you stop a supplement you are taking is a conversation for you and your clinician.
The pattern people describe is a stretch of lighter or more broken sleep, more vivid dreams, and some evening restlessness, easing as the weeks pass. This is self-reported rather than measured in a trial, so treat it as what to expect emotionally rather than a clinical prediction. Some people notice nothing at all.
If sleep is worse a month later, that is a signal the underlying problem was never addressed, and it is worth raising with a clinician rather than resuming on your own.
Melatonin is a circadian signal. It tells your body roughly when to be sleepy. It does nothing for a racing mind, for pain, for a bedroom that is too warm, for caffeine too late in the day, or for a schedule that changes every week. If one of those is what is actually keeping you awake, melatonin was never addressing it, and stopping simply removes the one thing that was papering over the gap.
This is the part worth spending time on before you change anything. Working out which part of your sleep is failing, whether that is falling asleep, staying asleep, or waking unrefreshed, tells you far more than any stopping schedule would.
Some people introduce another sleep support before they stop, so they are not changing two things at once. Reishi is one option used this way, as are magnesium glycinate, glycine and L-theanine. No study has tested whether any of them changes the experience of stopping melatonin, so this is about sequencing rather than any effect on the stopping itself.
A comparison of what the evidence actually shows for each is in the main guide, and the question of stopping gradually versus all at once is covered in cold turkey versus tapering.
Worth a conversation rather than a self-managed change: if you take prescription sleep or anxiety medication, if you are pregnant or breastfeeding, if your sleep problem started suddenly or came with other symptoms, if you snore heavily or stop breathing in your sleep, or if poor sleep has lasted months and is affecting your daytime functioning. Chronic insomnia has treatments with far better evidence behind them than any supplement, and a clinician can point you at them.
This page is educational and is not medical advice, diagnosis or treatment. Supplements are not intended to diagnose, treat, cure or prevent any disease.