sulfamethoxypyridazine sulfamethoxypyridazine sulfamethoxypyridazine is a sulfonamide antibacterial. sulfamethoxypyridazineclinical dataahfs/drugs.cominternational drug namesatc codej01ed05 (who) qj01eq15 (who)identifiers iupac name 4-amino-n-(6-methoxypyridazin-3-yl)benzenesulfonamide cas number80-35-3 npubchem cid5330chemspider5139 yuniit034e4ns2zkeggd02439 ychebichebi:102516 ychemblchembl268869 ycomptox dashboard (epa)dtxsid5023611 echa infocard100.001.157 chemical and physical dataformulac11h12n4o3smolar mass280.30 g·mol−13d model (jsmol)interactive image smiles o=s(=o)(nc1nnc(oc)cc1)c2ccc(n)cc2 inchi inchi=1s/c11h12n4o3s/c1-18-11-7-6-10(13-14-11)15-19(16,17)9-4-2-8(12)3-5-9/h2-7h,12h2,1h3,(h,13,15) ykey:vlywmpoksswjal-uhfffaoysa-n y ny (what is this?) (verify) it is prescribed for vaginal irritation, and severe acute thrush. it is also used in the treatment of dermatitis herpetiformis, where it is an alternative therapy to dapsone. sulfamethoxypyridazine is supplied as 500mg tablets.