Used to treat overactive bladder by reducing involuntary contractions of the bladder muscle. It helps control symptoms such as frequent urination, urgency, and urinary incontinence. Works by selectively blocking muscarinic receptors, particularly the M3 subtype, which play a key role in bladder smooth muscle contraction. Due to its selectivity, it may cause fewer side effects like dry mouth and constipation compared to non-selective anticholinergic agents. Typically taken orally in extended-release formulations for once-daily dosing.