oxybutynin

== English == === Etymology === Probably from hydroxy +‎ butynyl +‎ -in. === Pronunciation === (General American) IPA(key): /ˌɑk.siˈbjuː.tən.ɪn/ === Noun === oxybutynin (uncountable) (pharmacology) An antispasmodic and anticholinergic drug C22H31NO3 administered transdermally as a skin patch or orally in the form of its hydrochloride C22H31NO3·HCl to relax the smooth muscles of the bladder in the treatment of urge incontinence, frequent urination, and urinary urgency. === References === “oxybutynin”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.