Roxatidine

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Roxatidine
Systematic (IUPAC) name
250px
2-oxo-2-(3-[3-(piperidin-1-ylmethyl)phenoxy]propylamino)ethyl acetate
Clinical data
Routes of administration	Oral
Pharmacokinetic data
Bioavailability	80–90%
Protein binding	5–7%
Metabolism	Hepatic deacetylation Minor involvement of CYP2D6 and CYP2A6
Biological half-life	5–7 hours
Excretion	Renal

Identifiers
CAS Number	78628-28-1
ATC code	A02BA06 (WHO)
PubChem	CID 5105
Chemical data
Formula	C₁₉H₂₈N₂O₄
Molar mass	348.437 g/mol[[Script error: No such module "String".]]

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Roxatidine acetate is a specific and competitive H₂ receptor antagonist. The antisecretory effect of roxatidine acetate is mediated by its main metabolite, roxatidine. Pharmacodynamic studies revealed that 150 mg of roxatidine acetate were optimal in suppressing gastric acid secretion, and that a single bedtime dose of 150 mg was more effective than a dose of 75 mg twice daily in terms of inhibiting nocturnal acid secretion.^{[citation needed]}

Roxatidine acetate has no antiandrogenic effects and does not influence drug-metabolizing enzymes in the liver.^{[citation needed]}

It is currently sold in South Africa under the tradename Roxit.

File:Roxatidine.svg

Structure of roxatidine, the metabolite and active pharmaceutical ingredient.

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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 • Chlorpheniramine • 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 Antagonists 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: Bisfentidine • Burimamide • Cimetidine • Dalcotidine • Donetidine • Ebrotidine • Etintidine • Famotidine • Lafutidine • Lamtidine • Lavoltidine/Loxtidine • Lupitidine • Metiamide • Mifentidine • Niperotidine • Nizatidine • Osutidine • Oxmetidine • Pibutidine • Quisultidine/Quisultazine • Ramixotidine • Ranitidine • Roxatidine • Sufotidine • Tiotidine • Tuvatidine • Venritidine • Zaltidine
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 • SCH-79,687 • Thioperamide • Tiprolisant • 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	α-FMH • Brocresine • Catechin • Cyanidanol-3 • McN-A-1293 • ME • Meciadanol • Naringenin • Thiazol-4-yimethoxyamine • Tritoqualine • Zy-15,029

Catabolism

HNMT inhibitors	Amodiaquine • BW-301U • Diphenhydramine • Harmaline • Metoprine • Quinacrine • SKF-91,488 • Tacrine
DAO inhibitors	1,4-Diamino-2-butyne • Aminoguanidine