In this issue of Urologic Clinics of North America, guest editor Dr. Craig V. Comiter brings his considerable expertise to the topic of Urologic Pharmacology. Medical therapies for benign prostatic hyperplasia, erectile dysfunction, hypogonadism, overactive bladder, and prostate cancer are widely available, and a basic understanding of the pharmacology of existing treatment options are necessary to avoid complications and maximize efficacy associated with patient outcomes. In this issue, top experts in the field provide current clinical information to help urologists effectively and quickly treat patients.