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Effect of Tadalafil Once a Day in Men With Erectile Dysfunction

This study has been completed.
Sponsor:
Information provided by:
Eli Lilly and Company
ClinicalTrials.gov Identifier:
NCT00836693
First received: February 2, 2009
Last updated: December 15, 2010
Last verified: December 2010
History of Changes
  Purpose

The primary aim of this study is to assess the efficacy and safety of tadalafil 5 mg administered once a day in patients with erectile dysfunction (ED) who are naïve to PDE5 (phosphodiesterase type 5) inhibitors. Patients may be dose reduced to 2.5mg based on tolerability.


Condition Intervention Phase
Erectile Dysfunction
 Drug: tadalafil
Drug: placebo
 Phase 3

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: A Randomized, Double-Blind, Placebo-Controlled, Parallel Study to Assess the Efficacy and Safety of Tadalafil (LY450190) Once a Day in Subjects With Erectile Dysfunction Who Are Naïve to PDE5 Inhibitors

Resource links provided by NLM:

Drug Information available for: Tadalafil
U.S. FDA Resources

Further study details as provided by Eli Lilly and Company:

Primary Outcome Measures:
  • Change From Baseline in the International Index of Erectile Function - Erectile Function Domain (IIEF-EF) at Week 12 [ Time Frame: Baseline, Week 12 ] [ Designated as safety issue: No ]
    Self-reported erectile function over the past 4 weeks. Scores range from 0 (low or no erectile function) to 5 (high erectile function) on 6 questions (1-5, 15 of the IIEF). Total Erectile Function Domain scores range from 0 to 30.

  • Change From Baseline in Question 2 of the Patient Sexual Encounter Profile (SEP) Diary at Week 12 in Percentage of Yes Responses [ Time Frame: Baseline, Week 12 ] [ Designated as safety issue: No ]
    Assessed was the mean change from baseline in the percentage of Yes responses to the SEP diary Question 2. "Were you able to insert your penis into your partner's vagina?" Data are presented as the mean percentage of yes responses per participant.

  • Sexual Encounter Profile (SEP) Diary, Question 3 Change From Baseline to Week 12 in Percentage of Yes Responses [ Time Frame: Baseline, 12 weeks ] [ Designated as safety issue: No ]
    Assessed was the mean change from baseline in the percentage of Yes responses to the SEP diary Question 3. "Did your erection last long enough for you to have successful intercourse?" Data are presented as the mean percentage of yes responses per participant.


Secondary Outcome Measures:
  • Change From Baseline to 12 Week Endpoint in Nocturnal Penile Tumescence (NPT) Pattern: Number of Erectile Events Per Night [ Time Frame: Baseline, Week 12 ] [ Designated as safety issue: No ]
    NPT was measured using electrobioimpedance volumetric assessment (NEVA). The NEVA device measures a man's erections during the night. The man wears the device for three nights prior to visit 2 (baseline), visit 5 (end of randomised treatment) and visit 6 (end of follow-up). Data are entered for the 2 nights prior to the visit. During the night the man may have multiple erections. The number of erections is recorded.

  • Change From Baseline to 12 Week Endpoint in Nocturnal Penile Tumescence (NPT) Pattern: Duration of Erectile Events Per Night [ Time Frame: Baseline, Week 12 ] [ Designated as safety issue: No ]
    NPT was measured using electrobioimpedance volumetric assessment (NEVA). The NEVA device measures a man's erections during the night. The duration of erections are measured and recorded. Data presented are the duration of erectile events at baseline and the change from baseline to Week 12.

  • Change From Baseline to 12 Week Endpoint in Nocturnal Penile Tumescence (NPT) Pattern: Percentage Volumetric Change [ Time Frame: Baseline, Week 12 ] [ Designated as safety issue: No ]
    NPT was measured using electrobioimpedance volumetric assessment (NEVA). The NEVA device measures a man's erections during the night. The percent of volume change of the penis during erections is measured and recorded for each erection. Data presented are mean percentage of volumetric change from baseline to Week 12.

  • Change From Baseline to 12 Week Endpoint in the Frequency of Spontaneous Morning Erections Captured by Patient Diary [ Time Frame: Baseline, 12 weeks ] [ Designated as safety issue: No ]
    The morning erection diary allows the participant to record whether he experienced an erection on waking. The participant is to complete the morning erection diary every morning during the run-in, treatment and follow-up periods. The percentage of mornings the participant reported an erection is analysed.

  • The Erectile Dysfunction Inventory of Treatment Satisfaction (EDITS) Questionnaire at 12 Week Endpoint [ Time Frame: Week 12 ] [ Designated as safety issue: No ]
    The subject questionnaire consists of 11 questions. Each question is rated on a scale of 0 (extremely low treatment satisfaction) to 4 (extremely high treatment satisfaction). The EDITS summary score will be obtained by adding each individual result for all questions, dividing by the number of questions answered (mean satisfaction score), and multiplying by 25, thus obtaining a score that ranges from 0 (extremely low treatment satisfaction) to 100 (extremely high satisfaction).

  • Change From Baseline to 12 Week Endpoint in Total and Subdomain Scores of the Self-Esteem and Relationship (SEAR) Questionnaire [ Time Frame: Baseline, Week 12 ] [ Designated as safety issue: No ]
    SEAR measures improvement in self-esteem and relationship satisfaction. Questionnaire consists of two domains, Sexual Relationship (items 1-8) and Confidence (items 9-14). All questions except negatively worded questions 8 and 11 are scored from 1=almost never/never to 5=almost always/always. Questions 8 and 11 were reverse scored, thus a higher score signifies a more favorable response for all 14 items. Overall score is transformed into a 0 (least favorable) to 100 (most favorable) scale.

  • Change From Baseline to 12 Week Endpoint in International Index of Erectile Function (IIEF), Orgasmic Functions (OF) [ Time Frame: Baseline, Week 12 ] [ Designated as safety issue: No ]
    Self-reported overall satisfaction over the past 4 weeks. Scores range from 0 (low/no satisfaction) to 5 (high satisfaction), thus the 2 questions of the IIEF-OF domain range from 0 to 10.

  • Change From Baseline to 12 Week Endpoint in International Index of Erectile Function (IIEF), Sexual Desire (SD) [ Time Frame: Baseline, 12 weeks ] [ Designated as safety issue: No ]
    Self-reported overall satisfaction over the past 4 weeks. Scores range from 0 (low/no satisfaction to 5 (high satisfaction), thus the 2 questions of the IIEF-SD domain range from 0 to 10.

  • Change From Baseline to 12 Week Endpoint in International Index of Erectile Function (IIEF), Intercourse Satisfaction (IS) [ Time Frame: Baseline, Week 12 ] [ Designated as safety issue: No ]
    Self-reported intercourse satisfaction over the past 4 weeks. Scores range from 0 (low/no satisfaction) to 5 (high satisfaction), thus the 3 questions of the IIEF-IS domain range from 0 to 15.

  • Change From Baseline to 12 Week Endpoint in International Index of Erectile Function (IIEF), Overall Satisfaction (OS) [ Time Frame: Baseline, 12 weeks ] [ Designated as safety issue: No ]
    Self-reported overall satisfaction over the past 4 weeks. Scores range from 0 (low/no satisfaction to 5 (high satisfaction), thus the 2 questions of the IIEF-OS domain range from 0 to 10.

  • Change From Baseline to 12 Week Endpoint in Sexual Encounter Profile (SEP) Question 1 Percentage of "Yes" Responses [ Time Frame: Baseline, 12 weeks ] [ Designated as safety issue: No ]
    Assessed was the mean change from baseline in the percentage of Yes responses to the SEP diary Question 1. "Were you able to achieve at least some erection (some enlargement of the penis)? " Data are presented as the mean percentage of yes responses per participant.

  • Change From Baseline to 12 Week Endpoint in Sexual Encounter Profile (SEP) Question 4 Percentage of "Yes" Responses [ Time Frame: Baseline, 12 weeks ] [ Designated as safety issue: No ]
    Assessed was the mean change from baseline in the percentage of Yes responses to the SEP diary Question 4. "Were you satisfied with the hardness of your erection?" Data are presented as the mean percentage of yes responses per participant.

  • Change From Baseline to 12 Week Endpoint in Sexual Encounter Profile (SEP) Question 5 Percentage of "Yes" Responses [ Time Frame: Baseline, 12 weeks ] [ Designated as safety issue: No ]
    Assessed was the mean change from baseline in the percentage of Yes responses to the SEP diary Question 5. "Were you satisfied overall with this sexual experience?" Data are presented as the mean percentage of yes responses per participant.

  • Global Assessment Question (GAQ) Question 1 at 12 Week Endpoint [ Time Frame: Week 12 ] [ Designated as safety issue: No ]
    GAQ Question 1: Choose the one number which best describes how you perceive your ability to achieve and maintain your erections now, compared to how it was before you began taking medication in this study. Responses range from 1=very much better to 7=very much worse.

  • Global Assessment Question (GAQ) Question 2 at 12 Week Endpoint [ Time Frame: Week 12 ] [ Designated as safety issue: No ]
    GAQ Question 2: Choose the one number which best describes how you perceive your sexual life is now, compared to how it was before you began taking medication in this study. Responses range from 1=very much better to 7=very much worse.


Enrollment: 217
Study Start Date: January 2009
Study Completion Date: January 2010
Primary Completion Date: January 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Tadalafil Drug: tadalafil
5 milligrams (mg) administered orally once a day for 12 weeks
Other Names:
  • Cialis
  • LY450190
Placebo Comparator: Placebo Drug: placebo
tablet administered orally once a day for 12 weeks.

  Eligibility

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

Inclusion Criteria:

  • You are male and aged at least 18 years.
  • Have a history of erectile dysfunction (ED)(defined as the consistent inability to achieve and/or maintain an erection sufficient to permit satisfactory sexual intercourse) of at least 3 months duration.
  • Agree not to use any other treatment for ED, including herbal and over-the-counter (OTC) medications, during the study
  • You agree to make at least four sexual intercourse attempts with the female sexual study partner during the 4-week run-in period without medication
  • Your entry laboratory test results and medical tests meet study requirements
  • You agree to use the study drug only as instructed by your study doctor and staff and to return any unused study drug and containers at the end of the study or as otherwise instructed by the study doctor.
  • If currently using cholesterol lowering medications (for example: statins) or medications to lower blood pressure (example: angiotensin-converting enzyme (ACE) inhibitors or calcium channel blocker medications), you need to be on a stable dose and you and your study doctor do not expect any dose change during the study.

Exclusion Criteria:

  • You have received previous or current treatment with tadalafil or any other PDE5 inhibitor.
  • Currently receives treatment with doxazosin, nitrates, cancer chemotherapy, or anti-androgens (except finasteride e.g. Propecia™ or Proscar®, or dutasteride e.g. Avodart®).
  • You have had significant heart disease as determined by your doctor in charge of this study or a member of the doctor's staff.
  • Have a history of significant central nervous system injuries (including stroke or spinal cord injury) within the last 6 months.
  • Have a history of loss of vision in one eye because of nonarteritic anterior ischemic optic neuropathy (NAION), regardless of whether this episode was in connection or not with previous PDE5 inhibitor exposure.
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00836693

Locations
Germany
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.
Bad Wiessee, Germany, D-83707
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.
Berlin, Germany, 13465
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.
Hamburg, Germany, 20354
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.
Koblenz, Germany, D-56068
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.
Leipzig, Germany, 04109
Greece
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Athens, Greece, 11527
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Patras, Greece, 26500
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Thessaloniki, Greece, 56429
Italy
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Catania, Italy, 95100
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Firenze, Italy, 50139
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L Aquila, Italy, 67100
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Milano, Italy, 20132
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Rome, Italy, 00100
Poland
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.
Bialystok, Poland, 15-223
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Legionowo, Poland, 05-120
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Lodz, Poland, 91-425
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Warsaw, Poland, 00-631
Spain
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Aravaca, Spain, 28023
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Barcelona, Spain, 08025
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.
Madrid, Spain, 28040
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.
Majadahonda, Spain, 28222
Sponsors and Collaborators
Eli Lilly and Company
Investigators
Study Director: Call 1-877-CTLILLY(1-877-285-459) or 1-317-615-4559 Mon - Fri 9 AM - 5 PM eastern time (UTC/GMT -5 hours, EST) Eli Lilly and Company
  More Information

No publications provided by Eli Lilly and Company

Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

Responsible Party: Chief Medical Officer, Eli Lilly
ClinicalTrials.gov Identifier: NCT00836693     History of Changes
Other Study ID Numbers: 12229, H6D-MC-LVHX
Study First Received: February 2, 2009
Results First Received: December 15, 2010
Last Updated: December 15, 2010
Health Authority: Germany: Federal Institute for Drugs and Medical Devices
Greece: National Organization of Medicines
Italy: The Italian Medicines Agency
Poland: Office for Registration of Medicinal Products, Medical Devices and Biocidal Products
Spain: Spanish Agency of Medicines

Keywords provided by Eli Lilly and Company:
Erectile Dysfunction

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

ClinicalTrials.gov processed this record on May 19, 2013