Ranitidin
{{Drugbox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 458460406
| IUPAC_name = N-(2-[(5-[(dimethylamino)methyl]furan-2-yl)methylthio]ethyl)-N-methyl-2-nitroethene-1,1-diamine
| image = Ranitidine.svg
| width = 250
| image2 = File:Ranitidine-A-3D-balls.png

| pronounce = 
| tradename = Zantac, lainnya
| Drugs.com = 
| MedlinePlus = a601106
| licence_US = Ranitidine
| pregnancy_AU = B1
| pregnancy_US = B
| legal_AU = S2
| legal_US = OTC
| legal_US_comment = / Rx-only
| legal_UK = GSL
| routes_of_administration = Dimakan, IV

| bioavailability = 50% (Dimakan)
| protein_bound = 15%
| metabolism = Hepatik: FMO, termasuk FMO3; enzim lainnya
| elimination_half-life = 2–3 hours
| excretion = 30–70% Renal
| onset = 55–65 minutes (150 mg dose)55–115 minutes (75 mg dose)

| CAS_number_Ref = 
| CAS_number = 66357-35-5
| ATC_prefix = A02
| ATC_suffix = BA02
| ATC_supplemental =  (ranitidine bismuth citrate)
| IUPHAR_ligand = 1234
| DrugBank_Ref = 
| DrugBank = DB00863
| PubChem = 3001055
|  ChemSpiderID_Ref = 
| ChemSpiderID = 4863
| UNII_Ref = 
| UNII = 884KT10YB7
| KEGG_Ref = 
| KEGG = D00422
| ChEBI_Ref =  
| ChEBI = 8776
| ChEMBL_Ref = 
| ChEMBL = 1790041
| synonyms = Dimethyl [(5-{[(2-{[1-(methylamino)-2-nitroethenyl]amino}ethyl)sulfanyl]methyl}furan-2-yl)methyl]amine

| C=13 | H=22 | N=4 | O=3 | S=1
| molecular_weight = 314.4 g/mol
| smiles = [O-][N+](=O)C=C(NC)NCCSCc1ccc(o1)CN(C)C
|  StdInChI_Ref = 
| StdInChI = 1S/C13H22N4O3S/c1-14-13(9-17(18)19)15-6-7-21-10-12-5-4-11(20-12)8-16(2)3/h4-5,9,14-15H,6-8,10H2,1-3H3
|  StdInChIKey_Ref = 
| StdInChIKey = VMXUWOKSQNHOCA-UHFFFAOYSA-N
}}Ranitidin''' adalah golongan obat antagonis H2, yang bekerja menurunkan produksi asam lambung. Obat ini umumnya digunakan dalam pengobatan penyakit ulkus peptikum, penyakit refluks gastroesofagus, dan sindrom Zollinger-Ellison. Terdapat juga bukti tentatif manfaat untuk hives''. Obat dapat diambil melalui mulut, dengan suntikan ke dalam otot, atau ke pembuluh darah.

Referensi

Pranala luar 
 U.S. National Library of Medicine: Drug Information Portal – Ranitidine

Farmakologi
Furan
Obat Esensial Nasional Indonesia