Medication Utilization Behavior in Patients Receiving Phosphodiesterase Type 5 Inhibitors for Erectile Dysfunction

Patients who were initially prescribed sildenafil were significantly more likely to refill their medication and significantly less likely to switch medications during the study period compared with patients who were initially prescribed vardenafil or tadalafil. These findings may indicate greater treatment satisfaction in patients receiving sildenafil, although future prospective evaluation is required. Mulhall JP, McLaughlin TP, Harnett JP, Scott B, Burhani S, and Russell D. Medication utilization behavior in patients receiving phosphodiesterase type 5 inhibitors for erectile dysfunction. J Sex Med 2005;2:848-855.