Early Start of Oral Sildenafil 100mg for Erectile Dysfunction After Robotic Assisted Laparoscopic Radical Prostatectomy

2014-07-23 21:11:01 | BioPortfolio


The investigators try to investigate the benefit of early administration (immediately after urethral catheter removal) of sildenafil after nerve-sparing RALP for 3 months. The investigators will compare the potency rates up to 2 years after nerve-sparing RALP in men with on- demand sildenafil 100mg dosing from the early postoperative period (immediately after urethral catheter removal) with from the delayed postoperative period (3 months after RP).


Various studies using animal models of CN neuroparaxia and clinical trials have demonstrated somewhat beneficial effect of PDE-5 inhibitors on smooth muscle cells of the corpus cavernosum. PDE-5 inhibitors including sildenafil have demonstrated the effectiveness in the management of postprostatectomy ED. In the animal experiments, PDE-5 inhibitors lowered the severity of the fibrosis in the corpus cavernosum of rats with CN cutting. In the clinical trials, on-demand dosing or routine dosing of PDE-5 inhibitors improved the potency rates in men received NSRP, and improvements of the potency rate did not appear to be statistically different among two dosing regimens.

But, there are few studies on the potency rate according to the start time of the administration of PDE-5 inhibitors (eg. early vs. delayed post-operative dosing). At present, it is not conclusive that whether nerve-sparing RALP provides more higher potency rate than conventional surgery in men with prostate cancers. But, with more precise dissection of CN, the robotic surgery appears to have more chances to maintain the potency in men received RP.

Study Design

Allocation: Randomized, Control: Active Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment


Prostate Cancer


sildenafil 100mg


Not yet recruiting


Seoul National University Bundang Hospital

Results (where available)

View Results


Published on BioPortfolio: 2014-07-23T21:11:01-0400

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Medical and Biotech [MESH] Definitions

A glycoprotein that is a kallikrein-like serine proteinase and an esterase, produced by epithelial cells of both normal and malignant prostate tissue. It is an important marker for the diagnosis of prostate cancer.

A synthetic retinoid that is used orally as a chemopreventive against prostate cancer and in women at risk of developing contralateral breast cancer. It is also effective as an antineoplastic agent.

Tissue ablation of the PROSTATE performed by ultrasound from a transducer placed in the RECTUM. The procedure is used to treat prostate cancer (PROSTATIC NEOPLASMS) and benign prostatic hypertrophy (PROSTATIC HYPERPLASIA).

Proteins secreted by the prostate gland. The major secretory proteins from the human prostate gland include PROSTATE-SPECIFIC ANTIGEN, prostate-specific acid phosphatase, prostate-specific membrane antigen, and prostate-specific protein-94.

Tumors or cancer of the PROSTATE.

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