Studying the Preference of Tadalafil to Sildenafil in Men With Problems Getting an Erection Across Nations

This study has been completed.
ICOS Corporation
Information provided by:
Eli Lilly and Company Identifier:
First received: October 18, 2007
Last updated: NA
Last verified: October 2007
History: No changes posted

Study to determine if men from around the world prefer sildenafil to tadalafil.

Condition Intervention Phase
Drug: tadalafil
Drug: sildenafil
Phase 3

Study Type: Interventional
Study Design: Endpoint Classification: Safety/Efficacy Study
Intervention Model: Crossover Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Switching From Sildenafil Citrate to Tadalafil in Treatment of Erectile Dysfunction: Multinational Assessment of Treatment Preference

Resource links provided by NLM:

Further study details as provided by Eli Lilly and Company:

Primary Outcome Measures:
  • Patient choice of treatment (either sildenafil or tadalafil) for use in the extension phase [ Time Frame: 14 weeks ]

Secondary Outcome Measures:
  • Assessment of sexual encounter attributes measured by the PAIRS scale including the Sexual Self-Confidence, Romance, and Time Pressure domains. [ Time Frame: 26 weeks ]

Enrollment: 2760
Study Start Date: November 2002
Study Completion Date: May 2004
Arms Assigned Interventions
Active Comparator: 1
Currently prescribed dosage of sildenafil is continued until wash-out period.
Drug: sildenafil
Current dosage of sildenafil is continued for 4 weeks (no more than once a day) of treatment assessment then the wash-out period will begin.
Active Comparator: 2
20 mg tadalafil given after one week sildenafil wash-out period.
Drug: tadalafil
20 mg tadalafil as needed by mouth no more than once a day for a 4 week initiation period and a 4 weeks treatment period.
Other Names:
  • LY450190
  • Cialis
  • IC351


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Must be of legal age according to your country.
  • Must have had a history of erectile dysfunction for at least 3 months.
  • Must currently and have been using sildenafil for the last six weeks.
  • Agree to not use any other ED treatment during the study.
  • Anticipate the same female sexual partner for the study.

Exclusion Criteria:

  • History of other primary sexual disorder
  • Treatment with nitrates
  • Have a penile implant or clinically significant penile deformity
  • History of certain heart problems
  • Do not meet certain lab value reference ranges
  Contacts and Locations
Please refer to this study by its identifier: NCT00547287

For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri from 9 AM to 5 PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.
Sao Paulo, Brazil
Sponsors and Collaborators
Eli Lilly and Company
ICOS Corporation
Study Director: Call 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559 Mon - Fri 9 AM - 5 PM Eastern Time (UTC/GMT - 5 hours, EST) Eli Lilly and Company
  More Information

Additional Information:
No publications provided Identifier: NCT00547287     History of Changes
Other Study ID Numbers: 7925, H6D-VI-LVFH
Study First Received: October 18, 2007
Last Updated: October 18, 2007
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Erectile Dysfunction
Sexual Dysfunction, Physiological
Genital Diseases, Male
Sexual Dysfunctions, Psychological
Sexual and Gender Disorders
Mental Disorders
Vasodilator Agents
Cardiovascular Agents
Therapeutic Uses
Pharmacologic Actions
Phosphodiesterase 5 Inhibitors
Phosphodiesterase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action processed this record on April 16, 2014