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 Histamine3 antagonist (paradoxically histamine increasing).
See also
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Others: Atypical antipsychotics (e.g., aripiprazole, asenapine, brexpiprazole, brilaroxazine, clozapine, iloperidone, olanzapine, paliperidone, quetiapine, risperidone, ziprasidone, zotepine)
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Phenylpiperazine antidepressants (e.g., hydroxynefazodone, nefazodone, trazodone, triazoledione)
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Tetracyclic antidepressants (e.g., amoxapine, loxapine, maprotiline, mianserin, mirtazapine, oxaprotiline)
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Tricyclic antidepressants (e.g., amitriptyline, butriptyline, clomipramine, desipramine, dosulepin (dothiepin), doxepin, imipramine, iprindole, lofepramine, nortriptyline, protriptyline, trimipramine)
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Typical antipsychotics (e.g., chlorpromazine, flupenthixol, fluphenazine, loxapine, perphenazine, prochlorperazine, thioridazine, thiothixene)
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