GERIATRIC PHARMACOTHERAPY CASE SERIES<br/> This is the first in a series of clinical case studies developed by ASCP's Pharmacy Education and Research Committee. The series reviews approaches to managing complex problems when treating older people with concurrent chronic and acute conditions.<br/> This case study reviews the treatment of a patient with overactive bladder (OAB), a geriatric syndrome that is a prevalent and multifactorial health condition associated with substantial morbidity and poor outcomes in older people. This case illustrates a counterintuitive presentation of OAB, approaches to analyzing the case, and planning for treatment.