A cewar ƙamus, monoamine neurotransmitter wani nau'in manzo ne na sinadarai wanda ke watsa sigina tsakanin ƙwayoyin jijiya (neurons) a cikin kwakwalwa da sauran sassan tsarin jijiya. Monoamines wani nau'in mahadi ne na kwayoyin halitta wanda ke dauke da rukunin amino guda daya da ke hade da zobe na kamshi, kuma sun hada da neurotransmitters kamar dopamine, norepinephrine, da serotonin. Wadannan neurotransmitters suna taka muhimmiyar rawa wajen daidaita yanayi, fahimta, hali, da sauran hanyoyin tafiyar da ilimin lissafi. Dysfunction na monoamine neurotransmitter tsarin ya kasance yana da hannu a cikin cututtuka daban-daban na jijiyoyi da na tabin hankali, ciki har da damuwa, damuwa, da schizophrenia.