{{Cat main|Melatonin}}
Category:Acetamides
Category:Antioxidants
Category:Aromatase inhibitors
Category:Circadian rhythm
Category:Drugs acting on the nervous system
Category:Hormones of the pineal gland
Category:Melatonin receptor agonists
Category:Methoxy compounds
Category:5-Methoxytryptamines
Category:Neurotransmitters
Category:Peptide hormones
Category:Phenol ethers
Category:Treatment of bipolar disorder
Category:Tryptamine alkaloids
Category:Wikipedia categories named after chemical compounds