Melatonin Quick Facts

Melatonin is a neurotransmitter which regulates one’s sleep cycle.

Other Brand Names: Circadin
Generic Name: Melatonin

Primary Uses:

  • Delayed Sleep-Phase Syndrome
  • Seasonal Affective Disorder
  • Narcolepsy
  • Insomnia
  • Other sleep disorders

Other Uses:

  • Bipolar Disorder
  • Autism
  • Depression
  • Alzheimer’s Disease
  • Anxiety
  • Tinnitus

Availability: In pills and liquid suspension, ranging from 1mg to 20mg, most commonly at 3mg. In North America it is available over-the-counter as a dietary supplement. Melatonin is also available by prescription in extended release form by the name Circadin.


  • Youth under 13
  • Low blood pressure

Side Effects:

Less serious side effects may include:

  • Drowsiness
  • Headaches
  • Nausea
  • Vivid dreams and nightmares
  • Hypothermia
  • Irritability

Metabolized: Liver
Excreted: Kidneys
Half-life: 35 to 50 minutes

Withdrawal Effects:

  • Insomnia


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