The International Index of Erectile Function (IIEF) is a multidimensional scale for assessing erectile dysfunction (ED). Developed by Rosen et al. in 1997, the IIEF is a self-administered questionnaire that evaluates various aspects of sexual function, including erectile function, orgasmic function, sexual desire, intercourse satisfaction, and overall satisfaction. The IIEF consists of 15 questions, each scored on a scale from 0 to 5, with higher scores indicating better sexual function. The IIEF is a valuable tool in clinical and research settings, helping healthcare professionals diagnose ED, monitor treatment outcomes, and assess the efficacy of interventions.