A Study Evaluating the Efficacy and Safety of Sildenafil in Patients With Erectile Dysfunction Receiving Hemodialysis

This study has been completed.
Information provided by:
ClinicalTrials.gov Identifier:
First received: March 31, 2008
Last updated: April 2, 2008
Last verified: April 2008
The study was done to evaluate the efficacy, safety, and tolerability of orally administered sildenafil taken as needed about one hour before sexual activity after a 10-week period in male outpatients with erectile dysfunction and severe renal failure who were on hemodialysis.

Condition Intervention Phase
Erectile Disfunction
Drug: placebo
Drug: sildenafil
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Treatment
Official Title: Multicenter, Double-Blind, Randomized, Placebo-Controlled Study of Flexible, Titration Dose Administered on an As Needed Basis (PRN) to Evaluate the Efficacy and the Safety of Sildenafil for the Treatment of Erectile Dysfunction in Male Patients on Hemodialysis

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Response to questions 3 (frequency of penetration) and 4 (frequency of maintained erection) of the International Index of Erectile Function (IIEF). [ Time Frame: Baseline and Week 10 ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • rate of successful sexual intercourse (number of attempts at sexual intercourse, number of successful attempts and percentage of attempts that were successful) [ Time Frame: Baseline to Week 10 ] [ Designated as safety issue: No ]
  • response to Partner's Satisfaction Questionnaire (optional) [ Time Frame: Week 10 ] [ Designated as safety issue: No ]
  • total Score of Quality of Life and erectile dysfunction questionnaire [ Time Frame: Baseline and Week 10 ] [ Designated as safety issue: No ]
  • monitoring of adverse events (AEs) and measurement of sitting blood pressure and heart rate [ Time Frame: Baseline, and Weeks 2, 4, 6, and 10 ] [ Designated as safety issue: Yes ]
  • response to Question 1 of the Global Efficacy Assessment Question [ Time Frame: Week 10 ] [ Designated as safety issue: No ]
  • responses to questions of the IIEF [ Time Frame: Baseline and Week 10 ] [ Designated as safety issue: No ]

Estimated Enrollment: 100
Study Start Date: October 2002
Study Completion Date: April 2005
Arms Assigned Interventions
Placebo Comparator: placebo Drug: placebo
Placebo comparator to be given per protocol.
Active Comparator: sildenafil Drug: sildenafil
oral sildenafil citrate at an initial dose of 25 mg, which could have been up-titrated to 50 mg at Visit 3 based on the patient's efficacy, safety and tolerability responses; at Visits 4 and 5, the dose could remain the same, be increased to 100 mg, or decreased to 25 mg depending on the safety, efficacy, and tolerability


Ages Eligible for Study:   19 Years and older
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Included patients had been in a stable relationship with a female partner for at least 6 months
  • A diagnosis of renal failure, with creatinine clearance ≤10 ml/min; been under hemodialysis for at least 6 months prior to the screening period, and a clinical diagnosis of erectile dysfunction (ED) as confirmed by International Index of Erectile Function (IIEF-5) score of <21 and defined as an "incapacity to obtain and/or maintain an erection sufficient for a satisfactory sexual performance".

Exclusion Criteria:

  • Patients in regular use of nitrates or nitric oxide donor drugs, or have received a prescription to use these substances in any formulation
  • Patients with genital anatomic malformation that may significantly impair erection (e.g., serious penile fibrosis)
  • Patients with other sexual disorders (e.g., hypoactive sexual desire) considered as a primary diagnosis, with a coexisting ED diagnosis, including patients receiving anti-androgenic therapy whose libido has not been preserved; patients receiving hormonal replacement therapy for at least 6 months, or whose dose has not been stabilized within the last 6 months before the study screening period
  • Patients with diabetes mellitus presenting poor control of their diabetes and/or proliferate diabetes retinopathy.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00654017

Pfizer Investigational Site
Fortaleza, CE, Brazil, 60430-370
Pfizer Investigational Site
Belo Horizonte, MG, Brazil, 30150-260
Pfizer Investigational Site
Belo Horizonte, Minas Gerais, Brazil
Pfizer Investigational Site
Londrina, PR, Brazil, 86010-010
Pfizer Investigational Site
JAU, Sao Paulo, Brazil, 17210-080
Pfizer Investigational Site
Sorocaba, São Paulo, Brazil, 18030-205
Pfizer Investigational Site
São José do Rio Preto, São Paulo, Brazil
Pfizer Investigational Site
Sao Paulo, Brazil, 01323-001
Sponsors and Collaborators
Study Director: Pfizer CT.gov Call Center Pfizer
  More Information

Additional Information:
Responsible Party: Director, Clinical Trial Disclosure Group, Pfizer, Inc.
ClinicalTrials.gov Identifier: NCT00654017     History of Changes
Other Study ID Numbers: A1481076 
Study First Received: March 31, 2008
Last Updated: April 2, 2008
Health Authority: Brazil: Ministry of Health

Additional relevant MeSH terms:
Erectile Dysfunction
Genital Diseases, Male
Mental Disorders
Sexual Dysfunction, Physiological
Sexual Dysfunctions, Psychological
Sildenafil Citrate
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Phosphodiesterase 5 Inhibitors
Phosphodiesterase Inhibitors
Urological Agents
Vasodilator Agents

ClinicalTrials.gov processed this record on May 26, 2016