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Medical Definition of Methylhistamines
1. Histamine substituted in any position with one or more methyl groups. Many of these are agonists for the h1, h2, or both histamine receptors. (12 Dec 1998)
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1. Histamine substituted in any position with one or more methyl groups. Many of these are agonists for the h1, h2, or both histamine receptors. (12 Dec 1998)