Trial of Percutaneous Tibial Nerve Stimulation (PTNS) Versus PTNS and Fesoterodine Fumarate

PTNS + 4mg of fesoterodine fumarate for 12 weeks

PTNS + placebo for 12 weeks

PTNS is an FDA-approved procedure for the diagnosis of overactive bladder, given on a weekly basis. Participants will be given PTNS + either 4mg of fesoterodine fumarate or placebo for 12 weeks, and followed by 4 weeks of washout followed by 12 weeks of PTNS + the opposite treatment (placebo or fesoterodine fumarate).