rac-Desethyl oxybutynin is an active metabolite of the muscarinic acetylcholine receptor (mAChR) antagonist oxybutynin .1,2,3rac-Desethyl oxybutynin is formed from oxybutynin by the cytochrome P450 (CYP) isoform CYP3A4.2It binds to mAChRs in isolated rat bladder, submaxillary gland, heart, and colon with Kivalues of 5.38, 3.12, 16, and 5.59 nM, respectively.rac-Desethyl oxybutynin (0.4 and 0.8 mg/kg) reduces micturition pressure in rats.3

Oxybutynin chloride (Oxybutynin HCl) is an anticholinergic medication used to relieve urinary and bladder difficulties. It competitively antagonizes the M1, M2, and M3 subtypes of the muscarinic acetylcholine receptor.

N-Desethyl Oxybutynin D5 hydrochloride is the the active metabolite Oxybutynin, is deuterium labeled N-Desethyl Oxybutynin hydrochloride.