Patients aged ≤75 yrs;

PSA \<10 ng/mL

Prostate Cancer ISUP grade ≤2 and cT≤2 at prostate biopsy

undergoing nerve sparing RARP;

preoperative IIEF-5 score ≥ 17;

First PSA (45d after surgery) \<0.1

Prostate Cancer ISUP grade ≤2 pT\<3b and at final pathology

≥ 18 yrs old;

compliants patients able to follow the study protocol and fill in IIEF-5 scores and EORTC quality of life questionnaires;

patients able to provide a written informed consent for the trial.

Minimum age: 18

anaesthesiologic contraindications to robotic surgery

patients submitted to pelvic radiotherapy or androgen deprivation

patients reporting major postoperative complications (CD≥3)

cardiovascular contraindications to PDE5i medical treatment