Histamine
Histamines were substances produced by an individual in response to an allergic reaction.

When Doctor Mendoza was infected with Ferengi pyrocytes in 2366, his immune system responded with a system-wide histaminic reaction. ()

An early symptom of infection by the Tarchanne is an allergic histamine response. ()

In Iresine syndrome, patients exhibit electropathic residue and lowered histamine count. The absence of lowered histamine levels permit the aftereffects of Ullian telepathic memory invasion to be distinguished from Iresine syndrome. ()

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Biochemical compounds