Study of Sildenafil Citrate During and After Radiotherapy/Hormone Therapy for Erectile Function Versus Radiotherapy/Hormone Therapy for Prostate Cancer
|ClinicalTrials.gov Identifier: NCT00142506|
Recruitment Status : Completed
First Posted : September 2, 2005
Results First Posted : October 20, 2017
Last Update Posted : October 20, 2017
Radiation sometimes affects the ability for a person to have a normal erection. Complete loss of erections after radiation treatment can happen in 40-50% of treated patients. There are medications, like sildenafil (also known as Viagra), that can help the ability to get back erections in almost 70% of such patients.
The purpose of this study is to see if taking Viagra every day starting right before, during and for about 6 months after treatment, could reduce the risk of long-term erectile dysfunction.
|Condition or disease||Intervention/treatment||Phase|
|Prostate Cancer Erectile Dysfunction||Drug: sildenafil citrate and questionaires Drug: placebo tablets and questionaires||Phase 3|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||290 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Double (Participant, Investigator)|
|Official Title:||This Protocol is a Randomized Prospective Study Comparing Prophylactic and on Demand Sildenafil Citrate Usage Administered During and After Radiotherapy With or Without Hormone Therapy Versus Radiotherapy With or Without Hormone Therapy Alone for the Preservation of Erectile Function After Therapy for Potent Patients With Clinically Localized Prostate Cancer|
|Study Start Date :||February 2005|
|Primary Completion Date :||April 2014|
|Study Completion Date :||April 2014|
Active Comparator: 1
radiotherapy with hormones, questionaire assessments
Drug: sildenafil citrate and questionaires
Hormone therapy patients will be instructed to begin the study drug simultaneously or within 1 month of start of hormone therapy. These patients will then continue to take the study drug for approximately 6 months following start of radiotherapy.In addition, during prophylactic phase (drug and placebo prophylactic arms) patients will have the opportunity to utilize oral 50 mg. tablets of Sildenafil Citrate in an on demand open label, flexible dose fashion. Hormone patients will be offered on demand Sildenafil for approximately 15-21 months.
Hormone therapy patients will complete assessments at baseline (within 4 weeks of start of study treatment) each month (only IIEF and QOL) before start of radiotherapy, at start of radiotherapy and at months 3, 6, 9, 12 18 and 24 from start of radiotherapy. Testosterone assessments will take place at baseline, and months 12 and 24.
Placebo Comparator: 2
radiotherapy without hormones, questionaire assessments
Drug: placebo tablets and questionaires
Non-hormone therapy patients will be instructed to begin the study drug 3 days prior to start of radiotherapy. Patients beginning study drug anytime between 3 days before start of radiotherapy and 2 weeks after the first day of radiotherapy will also be acceptable. These patients will then continue to take the study drug for approximately 6 months following start of radiotherapy.
In addition, during prophylactic phase (drug and placebo prophylactic arms) patients will have the opportunity to utilize oral 50 mg. tablets of Sildenafil Citrate in an on demand, open label, flexible dose fashion. Non-hormone patients will be offered on demand Sildenafil for approximately 12 months.
Assessments (IIEF, IPSS, QOL) will be completed by non-hormone therapy patients at baseline (within 4 weeks of start of study treatment) and at approximately months 3, 6, 9, 12, 18 and 24 from start of radiotherapy. Testosterone assessments will take place at baseline, and months 12 and 24.
- Assessment of Erectile Dysfunction [ Time Frame: Baseline, 6 months, 12 months, 24 months ]The International Index of Erectile Function (IIEF) is used for the evaluation of male sexual function and diagnostic evaluation of Erectile Dysfunction (ED) severity. There are 5 domains of the IIEF: erectile function, orgasmic function, sexual desire, intercourse satisfaction, and overall satisfaction. A score of 0-5 is awarded to each question of the IIEF. Total IIEF scores range from 0-75. Lower scores indicate severe erectile dysfunction (0=severe erectile dysfunction), while higher scores indicate less erectile dysfunction (75=no erectile dysfunction).
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00142506
|United States, New Jersey|
|Memorial Sloan-Kettering Cancer Center at Basking Ridge|
|Basking Ridge, New Jersey, United States, 07920|
|United States, New York|
|Memorial Sloan-Kettering Cancer Center at Commack|
|Commack, New York, United States, 11725|
|Memorial Sloan-Kettering Cancer Center|
|New York, New York, United States, 10021|
|Memorial Sloan-Kettering Cancer Center at Mercy Medical Center|
|Rockville Centre, New York, United States, 11570|
|Memorial Sloan-Kettering Cancer Center at Phelps Memorial Hospital Center|
|Sleepy Hollow, New York, United States, 10591|
|Principal Investigator:||Michael J Zelefsky, M.D.||Memorial Sloan Kettering Cancer Center|