28-Day Study of Testosterone Co-administered With Dutasteride in Hypogonadal Men

May 25, 2017 updated by: GlaxoSmithKline

A Phase II, 28-Day, Randomized, Parallel-Group, Open-Label Study Evaluating the Efficacy and Safety of Twice Daily Oral Doses of Testosterone (150-400mg) Co-administered With 0.25mg Dutasteride Compared With 400mg Testosterone Alone and 0.25mg Dutasteride Alone in the Treatment of Hypogonadism

The combination of testosterone and dutasteride is intended for use in hypogonadal men. This study will evaluate the effect of 28-day repeat dosing of this combination with varying BID doses of testosterone (T), in combination with a fixed BID dose of dutasteride (D), as well as a testosterone alone arm, on T and D levels in the blood. The rationale is to look for the effects of each compound on the other, and to look for any safety problems that may result when the 2 drugs are given together.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

43

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Torrance, California, United States, 90502
        • GSK Investigational Site
    • Kentucky
      • Louisville, Kentucky, United States, 40202
        • GSK Investigational Site
    • Maryland
      • Baltimore, Maryland, United States, 21287
        • GSK Investigational Site
    • North Carolina
      • Durham, North Carolina, United States, 27710
        • GSK Investigational Site
    • Texas
      • San Antonio, Texas, United States, 78229
        • GSK Investigational Site
    • Washington
      • Seattle, Washington, United States, 98195
        • GSK Investigational Site
      • Seattle, Washington, United States, 98108
        • GSK Investigational Site

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

Inclusion criteria:

  • Have a diagnosis of primary or secondary hypogonadism.
  • Have very low testosterone levels on 2 separate days.
  • Have a BMI within range of 18.5-35kg/m2.
  • Have not taken dutasteride for one year, or finasteride for the past 3 months.

Exclusion criteria:

  • Have had or have breast or prostate cancer, malabsorption syndrome, sleep apnea, psychiatric illness, polycythemia, or any other clinically significant current condition.
  • Are diabetic with an HbA1c >= 8.
  • Are taking any androgens, such as testosterone, saw palmetto.
  • Are taking ritonavir, indinavir, itraconazole, ketoconazole, erythromycin, warfarin, digoxin, cholestyramine, or any dietary/herbal/vitamin supplements.
  • Would donate more than 500 ML of blood over a 2 month period.
  • Physician does not think it is a good idea for you to participate in the trial. - Are unwilling to abstain from alcohol during the study.
  • Have a positive urine drug screen test.
  • Plan to change your smoking habits during the course of the trial.
  • Have Hepatitis C, Hepatitis B, or HIV.
  • Have a lab or EKG abnormality.
  • High or low blood pressure.
  • Have used of any investigational drug or device during the study or within 30 days prior to 1st dosing of study medication.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Safety measured by: monitoring laboratory tests changes in blood pressure and heart rate and heart activity on an ECG machine
Time Frame: days 1 and 28
days 1 and 28

Secondary Outcome Measures

Outcome Measure
Time Frame
Testosterone concentration .
Time Frame: on days 1 and 28
on days 1 and 28
Pharmacokinetics of testosterone, DHT, estradiol, estrone & dutasteride
Time Frame: days 1 and 28.
days 1 and 28.
Anabolic & androgenic Pharmacodynamic biomarkers
Time Frame: pre- and post-dose
pre- and post-dose

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

GlaxoSmithKline

Investigators

  • Study Director: GSK Clinical Trials, M.D., Ph.D., FACP, GlaxoSmithKline

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 2006

Primary Completion (Actual)

October 1, 2007

Study Completion (Actual)

October 1, 2007

Study Registration Dates

First Submitted

November 8, 2006

First Submitted That Met QC Criteria

November 8, 2006

First Posted (Estimate)

November 10, 2006

Study Record Updates

Last Update Posted (Actual)

May 30, 2017

Last Update Submitted That Met QC Criteria

May 25, 2017

Last Verified

May 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • TDC106220

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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