Prospective, Randomized, Open‐Label, Fixed‐Dose, Crossover Study to Establish Preference of Patients with Erectile Dysfunction after Taking the Three PDE‐5 Inhibitors

Although this is a preference study based on subjective elements, statistically significant differences comparing the IIEF score and the EDITS Questionnaire lead us to believe that beyond patients' subjective preference per se, said preference is probably also based on a genuinely superior response to one drug over another. Tolrà JR, Campaña JMC, Ciutat LF, and Miranda EF. Prospective, randomized, open‐label, fixed‐dose, crossover study to establish preference of patients with erectile dysfunction after taking the three PDE‐5 inhibitors. J Sex Med 2006;3:901-909.