What are the potential consequences of abruptly discontinuing 9 milligrams of melatonin (N-acetyl-5-methoxytryptamine)?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: April 8, 2025View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

From the Guidelines

Stopping 9 mg of melatonin suddenly is generally safe, but it is recommended to taper down gradually to minimize potential sleep disturbances. According to the clinical guideline for the evaluation and management of chronic insomnia in adults 1, rebound insomnia and withdrawal can be minimized by gradually tapering both the dose and frequency of administration.

When considering stopping melatonin, it's essential to note that long-term use of non-prescription treatments is not recommended due to limited efficacy and safety data 1. However, melatonin has been tested in a large number of clinical trials, and meta-analyses have demonstrated that it has small effects on sleep latency, with little effect on wake after sleep onset (WASO) or total sleep time (TST) 1.

To minimize sleep disruption, consider the following steps:

  • Taper down gradually over a week or two by reducing your dose by 1-3 mg every few days
  • Lower the dose by the smallest increment possible in successive steps of at least several days’ duration
  • Tapering the frequency of administration, such as every other or every third night, has also been shown to minimize rebound effects 1
  • Successful tapering may require several weeks to months, and concurrent application of cognitive-behavioral therapies can facilitate tapering and discontinuation of hypnotic medication 1.

It's also important to practice good sleep hygiene, such as maintaining a consistent sleep schedule, avoiding screens before bedtime, and creating a comfortable sleep environment, to help regulate your sleep-wake cycles after discontinuing melatonin.

From the Research

Stopping Melatonin Suddenly

  • There is no direct evidence in the provided studies to suggest that stopping 9 mg of melatonin suddenly will cause issues 2, 3, 4, 5, 6.
  • However, it is worth noting that the studies provided do not specifically address the topic of stopping melatonin suddenly, but rather focus on its efficacy and safety in treating sleep disorders.
  • One study found that prolonged-release melatonin had no withdrawal effects when discontinued 3.
  • Another study found that exogenous melatonin had no obvious short- or long-term adverse effects 2.
  • It is also important to note that melatonin is a hormone that is naturally produced by the body, and supplementing with it may not lead to dependence or addiction 2, 3.

Melatonin and Sleep Disorders

  • Melatonin has been shown to be effective in improving sleep quality and reducing sleep onset latency in patients with primary insomnia, delayed sleep phase syndrome, and other sleep disorders 3, 4, 5.
  • The evidence suggests that melatonin is a safe and effective treatment for sleep disorders, with minimal side effects and no evidence of rebound insomnia or withdrawal effects when discontinued 2, 3, 4, 5, 6.

Dosage and Duration

  • The studies provided do not specifically address the dosage of 9 mg of melatonin, but rather focus on the efficacy and safety of melatonin in general 2, 3, 4, 5, 6.
  • One study found that prolonged-release melatonin 2 mg was effective in improving sleep quality and morning alertness in patients with primary insomnia 3.
  • Another study found that exogenous melatonin had a significant effect on sleep quality as assessed by the Pittsburgh Sleep Quality Index (PSQI) 5.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.