Histamine agonist

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

Betahistine is an example used to treat vertigo.

Betazole and impromidine are examples used in diagnostics.

External links

Histaminergics

Receptor
ligands

H₁	Agonists: 2-Pyridylethylamine • Betahistine • Histamine • HTMT • UR-AK49 Antagonists: "1st generation": 4-Methyldiphenhydramine • Alimemazine • Antazoline • Azatadine • Bamipine • Benzatropine (Benztropine) • Bepotastine • Bromazine • Brompheniramine • Buclizine • Captodiame • Carbinoxamine • Chlorcyclizine • Chloropyramine • Chlorothen • Chlorphenamine • Chlorphenoxamine • Cinnarizine • Clemastine • Clobenzepam • Clocinizine • Cyclizine • Cyproheptadine • Dacemazine • Deptropine • Dexbrompheniramine • Dexchlorpheniramine • Dimenhydrinate • Dimetindene • Diphenhydramine • Diphenylpyraline • Doxylamine • Embramine • Etybenzatropine (Ethylbenztropine) • Etymemazine • Histapyrrodine • Homochlorcyclizine • Hydroxyethylpromethazine • Hydroxyzine • Isopromethazine • Isothipendyl • Meclozine • Mepyramine (Pyrilamine) • Mequitazine • Methafurylene • Methapyrilene • Methdilazine • Moxastine • Niaprazine • Orphenadrine • Oxatomide • Oxomemazine • Phenindamine • Pheniramine • Phenyltoloxamine • Pimethixene • Piperoxan • Promethazine • Propiomazine • Pyrrobutamine • Talastine • Thenalidine • Thenyldiamine • Thiazinamium • Thonzylamine • Tolpropamine • Tripelennamine • Triprolidine; "2nd generation": Acrivastine • Astemizole • Azelastine • Cetirizine • Clemizole • Clobenztropine • Ebastine • Emedastine • Epinastine • Ketotifen • Latrepirdine • Levocabastine • Loratadine • Mebhydrolin • Mizolastine • Olopatadine • Rupatadine • Setastine • Terfenadine; "3rd generation": Desloratadine • Fexofenadine • Levocetirizine; Miscellaneous: Tricyclic antidepressants (Amitriptyline, Doxepin, Trimipramine, etc) • Tetracyclic antidepressants (Mianserin, Mirtazapine, etc) • Serotonin antagonist and reuptake inhibitors (Trazodone, Nefazodone) • Typical antipsychotics (Chlorpromazine, Thioridazine, etc) • Atypical antipsychotics (Clozapine, Olanzapine, Quetiapine, etc)

H₂	Agonists: Amthamine • Betazole • Dimaprit • Histamine • HTMT • Impromidine • UR-AK49 Antagonists: Burimamide • Cimetidine • Ebrotidine • Famotidine • Lafutidine • Lavoltidine/Loxtidine • Lupitidine • Metiamide • Niperotidine • Nizatidine • Oxmetidine • Ranitidine • Roxatidine

H₃	Agonists: α-Methylhistamine • Cipralisant • Histamine • Imetit • Immepip • Immethridine • Methimepip • Proxyfan Antagonists: A-349,821 • A-423,579 • ABT-239 • Betahistine • Burimamide • Ciproxifan • Clobenpropit • Conessine • GSK-189,254 • Impentamine • Iodophenpropit • JNJ-5,207,852 • MK-0249 • NNC-38-1,049 • PF-03654746 • Pitolisant • SCH-79,687 • Thioperamide • VUF-5,681

H₄	Agonists: 4-Methylhistamine • Histamine • VUF-8,430 Antagonists: JNJ-7,777,120 • Thioperamide • VUF-6,002

Reuptake
inhibitors

Vesicular

VMAT inhibitors	Ibogaine • Reserpine • Tetrabenazine

Enzyme
inhibitors

Anabolism

HDC inhibitors	Catechin • Meciadanol • Naringenin • Tritoqualine

Catabolism

HNMT inhibitors	Amodiaquine • Diphenhydramine • Harmaline • Metoprine • Quinacrine • SKF-91,488 • Tacrine

DAO inhibitors	Aminoguanidine

Others

Precursors	L-Histidine

Cofactors	Vitamin B6 (pyridoxine, pyridoxamine, pyridoxal → Pyridoxal phosphate)

Neuromodulation

Types

Enzyme: Inducer • Inhibitor
Ion channel: Opener • Blocker
Receptor: Agonist • Antagonist • Positive allosteric modulator (PAM) • Negative allosteric modulator (NAM) • Inverse agonist
Transporter [Reuptake]: Enhancer (RE) • Inhibitor (RI) • Releaser (RA)
Miscellaneous: Precursor • Cofactor

Classes

Enzyme

see Enzyme inhibition

Ion channel

Calcium channel blocker (CCB) • Potassium channel blocker (PCB) • Sodium channel blocker (SCB) • Potassium channel opener (PCO)

Receptor &
transporter

BA/M

Adrenergic	Adrenergic receptor agonist (α, β (1, 2)) • Adrenergic receptor antagonist (α (1, 2), β) • Adrenergic reuptake inhibitor (ARI)

Dopaminergic	Dopamine receptor agonist • Dopamine receptor antagonist • Dopamine reuptake inhibitor (DRI)

Histaminergic	Histamine receptor agonist • Histamine receptor antagonist (H₁, H₂, H₃)

Serotonergic	Serotonin receptor agonist • Serotonin Receptor Antagonist (5-HT₃) • Serotonin reuptake inhibitor (SRI) • Serotonin reuptake enhancer (SRE)


GABAergic	GABA receptor agonist • GABA receptor antagonist • GABA reuptake inhibitor (GRI)

Glutamatergic	Glutamate receptor agonist (AMPA) • Glutamate receptor antagonist (NMDA)

Cholinergic

Acetylcholine receptor agonist (Muscarinic, Nicotinic) • Acetylcholine receptor antagonist (Muscarinic, Nicotinic (Ganglionic, Muscular))

Endocannabinoid

Cannabinoid receptor agonist • Cannabinoid receptor antagonist

Opioid

Opioid receptor agonist • Opioid receptor antagonist

Other

Adenosine reuptake inhibitor (AdoRI) • Angiotensin II receptor antagonist • Endothelin receptor antagonist • NK₁ receptor antagonist • Vasopressin receptor antagonist

Miscellaneous

Cofactor (see Enzyme cofactors) • Precursor (see Amino acids)

Histamine agonist

See also

External links