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Histamine agonist information


A histamine agonist is a drug which causes increased activity at one or more of the four histamine receptor subtypes.

H2: Betazole and Impromidine are examples of agonists used in diagnostics to increase histamine.

H3: Betahistine is a weak Histamine1 agonist and a very strong antagonist of the Histamine3 autoreceptor. Antagonizing H3 increases histaminergic tone.

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Histamine agonist

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A histamine agonist is a drug which causes increased activity at one or more of the four histamine receptor subtypes. H2: Betazole and Impromidine are...

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Antihistamine

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inverse agonist at histamine receptors. Only a few currently marketed H1-antihistamines are known to function as inverse agonists. Histamine makes blood vessels...

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Histamine H2 receptor

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affecting their activity. The drug betazole is an example of a histamine H2 receptor agonist. Histamine is a ubiquitous messenger molecule released from mast cells...

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Histamine H1 receptor

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histamine receptor belonging to the family of rhodopsin-like G-protein-coupled receptors. This receptor is activated by the biogenic amine histamine....

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Histamine H3 receptor

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selectivity; partial agonist effects on cAMP inhibition and MAPK activity, antagonist on histamine release, and inverse agonist on arachidonic acid release)...

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H1 antagonist

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H1-antihistamines. Virtually all H1-antihistamines function as inverse agonists at the histamine H1-receptor, as opposed to neutral antagonists, as was previously...

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Betahistine

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at histamine H3 receptors and a weak agonist at histamine H1 receptors. Betahistine has two mechanisms of action. Primarily, it is a weak agonist at histamine...

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Histamine

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Histamine is an organic nitrogenous compound involved in local immune responses communication, as well as regulating physiological functions in the gut...

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Dopamine agonist

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Parasympathomimetic drug (acetylcholine agonist) Histamine agonist Borovac JA (March 2016). "Side effects of a dopamine agonist therapy for Parkinson's disease: a mini-review...

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Inverse agonist

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efficacy. Receptors for which inverse agonists have been identified include the GABAA, melanocortin, mu opioid, histamine and beta adrenergic receptors. Both...

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Histamine H4 receptor

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The histamine H4 receptor, like the other three histamine receptors, is a member of the G protein-coupled receptor superfamily that in humans is encoded...

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Methimepip

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Methimepip is a histamine agonist which is highly selective for the H3 subtype. It is the N-methyl derivative of immepip. Kitbunnadaj R, Hashimoto T,...

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Lisuride

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and histamine H1 receptor. Lisuride is a partial agonist of the D2, D3, D4, 5-HT2A, 5-HT2C, 5-HT5A, and H1 receptors, a full or near-full agonist of the...

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Proxyfan

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histamine H3 receptor ligand which is a "protean agonist", producing different effects ranging from full agonist, to antagonist, to inverse agonist in...

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Ciproxifan

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Ciproxifan is an extremely potent histamine H3 inverse agonist/antagonist. The histamine H3 receptor is an inhibitory autoreceptor located on histaminergic...

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Eugeroic

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inhibitor (NDRI), and pitolisant, which acts as a histamine 3 (H3) receptor antagonist/inverse agonist. Cephalon, the original U.S. market rights holder...

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Physiological agonism and antagonism

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physiological agonists to each other. There are several substances that have antihistaminergic action despite not being ligands for the histamine receptor...

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GABA receptor agonist

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A GABA receptor agonist is a drug that is an agonist for one or more of the GABA receptors, producing typically sedative effects, and may also cause other...

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Impromidine

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potent and specific histamine H2 receptor agonist. It has been used diagnostically as a gastric secretion indicator. Histamine agonists Durant G, Duncan...

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Histamine trifluoromethyl toluidide

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Histamine trifluoromethyl toluidide (HTFMT) is a mixed H1/H2 histamine agonist which is significantly more potent than histamine itself. It also produces...

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H3 receptor antagonist

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the agonist histamine which contains an imidazole ring in its structure. The structural diversity among H3R is limited and all known H3R agonists today...

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H2 receptor antagonist

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blockers, are a class of medications that block the action of histamine at the histamine H2 receptors of the parietal cells in the stomach. This decreases...

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