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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT00498680
Other study ID # 2431-ctil
Secondary ID
Status Recruiting
Phase Phase 4
First received July 8, 2007
Last updated October 21, 2010
Start date March 2007
Est. completion date June 2011

Study information

Verified date January 2007
Source Rambam Health Care Campus
Contact Ilan gruenwald, MD
Phone 00972544474341
Email i_gruenwald@rambam.health.gov.il
Is FDA regulated No
Health authority Israel: Israeli Health Ministry Pharmaceutical Administration
Study type Interventional

Clinical Trial Summary

A prospective, randomized, 3-arm parallel trial on 45 males with ED that were never exposed to PDE5i therapy (naïve patients) will be enrolled.In each group, every patient will receive three treatment regimes (Viagra®50mg & Levitra®10mg, Viagra®100mg, Levitra®20mg), in different sequences of administration in such a manner that eventually each patient will receive all regimes in a double- blinded fasion.Safety will be evaluated at pre- screening by measuring hourly vital signs (blood pressure, heart rate)for 4 consecutive hours after taking half-dose combination. Any decrease in blood pressure of 20 mmhg below baseline will exclude the subject from the study. Effcacy will be evaluated by questionnaires (IIEF, Quality of erection questionnaire, grade of erection scale, Sear, QVS and Sexual Encounter Profiles for each sexual event). Non-parametric statistical analysis of the collected data Comparing the 3 groups will be performed.


Description:

A prospective, randomized, 3-arm parallel trial on 45 males with ED that were never exposed to PDE5i therapy (naïve patients) will be enrolled. Recruitment will be performed via advertisement or by offering newly diagnosed naïve ED patients visiting the clinic to participate in the study.

In each group, every patient will receive three treatment regimes (Viagra®50mg & Levitra®10mg, Viagra®100mg, Levitra®20mg), in different sequences of administration, as follows:

Group 1) 15 naïve patients will start with Viagra®100mg, continue with Levitra®20mg and end the study with combined Viagra®50mg & Levitra®10mg.

Group 2) 15 naïve patients will start with combined Viagra®50mg & Levitra®10mg, continue with Levitra®20mg and end the study with Viagra®100mg.

Group 3) 15 naïve patients will start with Levitra®20mg, continue with Viagra®100mg and end the study with combined Viagra®50mg & Levitra®10mg.

Inclusion criteria: - Relationship with the same partner for at least 3 month

- Age ranging between 35-65 years old

- Sexually active, (minimal frequency of one sexual encounter per 2 weeks)

- IIEF ED domain score 22 and below. Exclusion criteria: - Subjects with premature ejaculation as their main sexual complaint.

- Subjects with severe cardiovascular disease in the past 6 months, including cardiac failure, myocardial infarction, unstable angina, stroke or transient ischemic attack, symptomatic or clinically significant cardiac arrhythmias including atrial fibrillation,

- Subjects with Contraindications to PDE5i therapy. Namely patients receiving treatment with nitrate based medication or patients that for various reasons cannot take PDE5 inhibitors (severe hepatic diseases- cirrhosis or ALT (Alanine aminotransferase)>2x upper limit of normal), renal impairment (creatinine clearance > 30ml/min) or known hereditary degenerative retinal disorders such as retinitis pigmentosa. ,

- Concomitant treatment with potent CYP3A4 and CYP2C9 inhibitors (e.g protease inhibitors ritonavir and saquinavir, ketoconazole, itrakonazole, miconazole, nefazodone, claritromycin, troleandomycin, erythromycin and cimetidine)

- Subjects mentally unfit for the study.

SAFETY & ELIGIBILITY VISIT. After a thorough explanation of the nature of the study and its protocol and after understanding and signing the informed consent form. In this visit, each subject will start the study by measuring basic blood pressure levels and pulse rate. Under our supervision the subject will take the combined half dose as suggested. Blood pressure monitoring and pulse rate every half- hour at the clinic will be performed for 4 hours (according to the pharmacokinetic properties of the medications) . Any recordings of 20 mmhg below baseline will exclude the subject from the study. If no significant effect on blood pressure will be noted, the subject will be eligible for inclusion in the study, and will be invited for the FIRST visit 7 days later. ( a washout period of one week is sufficient to eliminate any effect of one-time dosing of the combined half dose treatment). Each included patient in the coming 6 visits will respond to the following pre-set sexual function and satisfaction questionnaires (Hebrew validated):

1. The full IIEF (International Index Erectile Function) standard Questionnaire

2. The SEAR (Self-Esteem And Relationship) questionnaire

3. QVS (Quality of Sexual Life) questionnaire

4. Quality of erection questionnaire

5. Grade of erection scale

At each visit, documentation of side-effects will be done and a physical examination (blood pressure and pulse rate) will be done. A 24 hour mobile phone dedicated to patient inquiries will be provided to each patient during the whole study.

Visit 1: The subject will be offered, at random, for 4 attempts at home, either a combination dose regime (Viagra®50mg & Levitra®10mg, 4 tablets each) or 4 tablets of Viagra®100mg single dose or 4 tablets of Levitra® 20 mg. The subject will also receive 6 SEP (Sexual Encounter Profile) diaries to fill out at home after each sexual attempt. After 4 attempts the subject will return for visit 2, will respond to the same questionnaires and an additional EDITS (Erectile Dysfunction Inventory of Treatment Satisfaction) questionnaire. A new visit will be rescheduled for 2 weeks later to allow a washout period. At visit 3 they will receive the 2nd regime and 4 new SEP diaries, and after 4 attempts will return to visit 4, fill out the same 4 questionnaires. Again, a new visit will be rescheduled for 2 weeks later to allow a washout period. On visit 5 they will return to receive the third treatment regime. Again, they will receive 4 SEP diaries to fill out after each sexual attempt at home. At their final visit (visit 6), in addition to the other 4 questionnaires, the patients will be required to respond to a preference questionnaire regarding the preferred regime.

The approximate timeline for performing the study for every patient is 1/2 a year from recruitment. The estimated timeline for completion of the study is 16 months.

*Only on inclusion

** Washout period 2 weeks

Non-parametric statistical analysis of the collected data from the questionnaires will be performed.


Recruitment information / eligibility

Status Recruiting
Enrollment 46
Est. completion date June 2011
Est. primary completion date January 2011
Accepts healthy volunteers No
Gender Male
Age group 35 Years to 65 Years
Eligibility Inclusion Criteria:

- Relationship with the same partner for at least 3 month

- Age ranging between 35-65 years old

- Sexually active, (minimal frequency of one sexual encounter per 2 weeks)

- IIEF ED domain score 22 and below.

Exclusion Criteria:

- Subjects with premature ejaculation as their main sexual complaint.

- Subjects with severe cardiovascular disease in the past 6 months, including cardiac failure, myocardial infarction, unstable angina, stroke or transient ischemic attack, symptomatic or clinically significant cardiac arrhythmias including atrial fibrillation,

- Subjects with Contraindications to PDE5i therapy. Namely patients receiving treatment with nitrate based medication or patients that for various reasons cannot take PDE5 inhibitors (severe hepatic diseases- cirrhosis or ALT (Alanine aminotransferase)>2x upper limit of normal), renal impairment (creatinine clearance > 30ml/min) or known hereditary degenerative retinal disorders such as retinitis pigmentosa. ,

- Concomitant treatment with potent CYP3A4 and CYP2C9 inhibitors (e.g protease inhibitors ritonavir and saquinavir, ketoconazole, itrakonazole, miconazole, nefazodone, claritromycin, troleandomycin, erythromycin and cimetidine)

- Subjects mentally unfit for the study.

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment


Related Conditions & MeSH terms


Intervention

Drug:
Sildenafil, Vardenafil
Sildenafil 100mg, vardenafil 20mg, combination of both half dosage.
Sildenafil
100mg
Vardenafil
20mg
Sildenafil & Vardenafil
50mg & 10 mg

Locations

Country Name City State
Israel Neuro-urology unit, Rambam Medical Center Haifa

Sponsors (1)

Lead Sponsor Collaborator
Rambam Health Care Campus

Country where clinical trial is conducted

Israel, 

Outcome

Type Measure Description Time frame Safety issue
Primary increase of 5 points or more in the IIEF erectile function domain 1 month No
See also
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Completed NCT00882934 - The Management of Erectile Dysfunction With Placebo Only N/A
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Completed NCT00249730 - Titration Study to Evaluate Efficacy and Satisfaction of Viagra in Men With Erectile Function. Phase 4
Completed NCT00245596 - Evaluation of the Index of Sexual Life Questionnaire Phase 4
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Completed NCT00245258 - Study to Evaluate Viagra's Ability to Provide a Better Sexual Experience Through Quality Erections and Satisfaction Phase 4
Completed NCT00547287 - Studying the Preference of Tadalafil to Sildenafil in Men With Problems Getting an Erection Across Nations Phase 3
Completed NCT03830164 - Pentoxifylline, Atorvastatin, and Vitamin E in Treating Patients With Erectile Dysfunction After Radiation Therapy for Prostate Cancer Phase 2
Completed NCT00150358 - To Yield Further Information On The Efficacy And Safety Of Viagra Among Subjects With Arterial Hypertension . Phase 4
Completed NCT00159809 - Efficacy Study Measuring The Impact Of Treatment With Viagra On The Depressive Symptoms Of Men With Erectile Dysfunction Phase 4
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