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Indolamines

Indolamines are a family of neurotransmitters that share a common molecular structure (namely, indolamine). Indolamines are a classification of monoamine neurotransmitter, along with catecholamines and ethylamine. A common example of an indolamine is serotonin, a neurotransmitter involved in mood and sleep. Another example of an indolamine is melatonin, which regulates the sleep-wake cycle (circadian rhythm) in humans.

In biochemistry, indolamines are substituted indole compounds that contain an amino group. Examples of indoleamines include the lysergamides.