Prostate CancerPhase 3NCT00122499
A Study to Assess the Efficacy of Tadalafil to Treat Erectile Dysfunction After Radiotherapy of Prostate Cancer
A Phase 3 study testing tadalafil in people with Prostate Cancer and Erectile Dysfunction, run by Erasmus Medical Center at 1 site in Netherlands.
Trial summary
This study has been designed to evaluate the efficacy and safety of a 20-mg dose of tadalafil administered "on demand" to patients with erectile dysfunction (ED) after external-beam radiotherapy (EBRT) of prostate cancer. Read more about this study
- Who is it for?
- Ages 18 years and older, men only
- Conditions the study is for
- Prostate Cancer, Erectile Dysfunction
- What is being tested?
- tadalafil
- How many people
- Not given
- Where
- 1 siteNetherlands
- Study dates
- Feb 2003to Feb 2005
- Phase
- Phase 3
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- Men only
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Heterosexual men, at least 18 years of age at Visit 1 and willing to participate in the study. If a qualifying participant has more than one female sexual partner during the study, the participant will not be excluded from the trial. However, the participant will be required to respond to the questionnaires based on the participant's sexual interactions with only one of these partners.
- Patients with histologically proven prostate cancer.
- Provide signed informed consent.
- Developed ED (defined as a consistent change in the quality of erection that adversely affects the patient's satisfaction with sexual intercourse) subsequent to EBRT for prostate cancer.
- Patients willing to make on average 1 sexual intercourse attempt every week during the study (including the 4-week run-in period without medication).
- Agree not to use any other ED treatment for at least 4 weeks before receiving the initial dose of study drug (ie, during the run-in period and during the treatment phase of the study).
- Have been treated by EBRT at least 12 months before screening and were documented to be potent before undergoing EBRT.
Who cannot join
- Patients will not be randomized if they did not make at least 1 sexual intercourse attempt during the run-in period. Also patients who are unable to appropriately complete the questionnaires will not be randomized.
- ED caused by other primary sexual disorders including premature ejaculation or ED caused by untreated endocrine disease (eg, hypopituitarism, hypothyroidism, or hypogonadism).
- History of pelvic surgery (including radical prostatectomy)
- Treatment with cancer chemotherapy or anti-androgens.
- Have a raising prostate specific antigen level or metastases at Visit 1.
- History of penile implant.
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- The presence of clinically significant penile deformity in the opinion of the investigator.
- Evidence of clinically significant renal insufficiency within the last 6 months before Visit 1.
- Active symptomatic hepatobiliary disease, including patients with evidence of jaundice at Visit 1.
- Patients with chronic stable angina treated with long-acting nitrates, or patients with chronic stable angina who have required short-acting nitrates in the last 90 days, or angina occurring during sexual intercourse in the last 6 months.
- Patients having met the criteria for unstable angina (Braunwald, 1989) within 6 months before Visit 1, history of myocardial infarction or coronary artery bypass graft surgery within 90 days before Visit 1, or percutaneous coronary intervention (eg, angioplasty or stent placement) within 90 days before Visit 1.
- Any supraventricular arrhythmia with an uncontrolled ventricular response (mean heart rate >100 bpm) at rest despite medical or device therapy, or any history of spontaneous or induced sustained ventricular tachycardia (heart rate >100 bpm for ≥ 30 sec) despite medical or device therapy, or the presence of an automatic internal cardioverter-defibrillator.
- A history of sudden cardiac arrest despite medical or device therapy.
- Any evidence of congestive heart failure class 2 or above within 6 months before Visit 1 (Criteria Committee, New York Heart Association, Inc., 1964).
- A new, significant conduction defect within 90 days before Visit 1.
- Systolic blood pressure >170 or <90 mm Hg or diastolic blood pressure >100 or <50 mm Hg, or patients with a history of malignant hypertension.
- History of significant central nervous system injuries (including stroke and spinal cord injury) within the 6 months before Visit 1.
- History of HIV infection.
- Any condition that would interfere with the patient's ability to provide informed consent or comply with study instructions, would place patient at increased risk, or might confound the interpretation of the study results.
- History of drug, alcohol, or substance abuse within the 6 months before Visit 1.
- Treatment within the 30 days before Visit 1 with a drug or device that has not received regulatory approval.
- Have any condition, limitation, or disease that could, in the judgment of the investigator, preclude evaluation of response to tadalafil.
Trial locations and contacts
1 site in 1 country.
About this study
This study has been designed to evaluate the efficacy and safety of a 20-mg dose of tadalafil administered "on demand" to patients with erectile dysfunction (ED) after external-beam radiotherapy (EBRT) of prostate cancer.
Read the detailed description
Prostate cancer has become the most frequent malignancy in older men in Western countries. Radiotherapy is a common treatment modality for early stage prostate cancer. Because of the high incidence of post-radiation erectile dysfunction (ED), up to 72% after external-beam radiotherapy, this patient category represents a most difficult therapeutic challenge. Oral drug therapy represents the first-line management option for patients with ED. The results of the studies completed thus far with sildenafil show that a phosphodiesterase type 5 inhibitor is a safe and efficacious drug for the treatment of post-radiation ED. No studies have investigated the efficacy of tadalafil in men complaining of ED after radiotherapy of prostate cancer. Because of the extended period of effectiveness, which may last up to 36 hours after intake, tadalafil allows freedom in the choice for time of sexual activity. Also the absence of restrictions of tadalafil intake with food or alcohol should simplify its administration. This randomized, double-blind, placebo-controlled, cross-over study has been designed to evaluate the efficacy and safety of "on demand" dosing of 20-mg of tadalafil or placebo administered for 12 weeks to patients with ED after external-beam radiotherapy for prostate cancer.
- Conditions
- Prostate Cancer, Erectile Dysfunction
- Being tested
- tadalafil
- Keywords
- Prostate cancer, Radiotherapy, Erectile dysfunction, Tadalafil
- Medical subject headings
- Prostatic Neoplasms, Erectile Dysfunction
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
tadalafilDrug
What is being measured
The primary outcome is the main question the study is designed to answer.
To evaluate the efficacy of 20 mg tadalafil, in comparison with placebo, in men with ED after 3-D conformal radiotherapy (3DCRT) of prostate cancer
Secondary outcomes (2)
Responses to the Global Assessment Questions (GAQ), and the other items of the Sexual Encounter Profile (SEP) and International Index of Erectile Function (IIEF)
To assess the side effects of 20 mg tadalafil in men with ED after 3DCRT
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 Jul 2005 (estimated)
- Study startFeb 2003
- Study completionFeb 2005
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Prostate CancerStudies of the same condition, open and under way.
- More trials run by Erasmus Medical CenterThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Double blind
Sponsor and investigators
- Lead sponsor
- Erasmus Medical Center
- Sponsor type
- University, hospital or other
- Investigators
- Luca Incrocci, M.D., Ph.D., Principal investigator, Erasmus Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00122499
- Sponsor's protocol ID
- 232.476/2003/180
- Status last verified
- Jul 2005
- First submitted
- 19 Jul 2005
- Last updated
- 27 Jul 2005
- Results posted
- No