A Study to Investigate the Effects on Blood Pressure and Pulse Rate of a Single 100mg Dose of Sildenafil in Patients With Benign Prostatic Hyperplasia Who Are Being Treated With Doxazosin

January 28, 2021 updated by: Pfizer's Upjohn has merged with Mylan to form Viatris Inc.

A Double-blind, Placebo-controlled, Randomized, 2-way Crossover Study to Investigate the Hemodynamic Effects of a Single Dose of Sildenafil (100mg) in Subjects With Benign Prostatic Hyperplasia Being Treated With Doxazosin

To investigate the effects of a single dose of sildenafil (100 mg) or placebo on blood pressure and pulse rate in subjects taking doxazosin for benign prostatic hyperplasia (BPH). To investigate the pharmacokinetics of doxazosin when co-administered with sildenafil 100 mg, and to investigate the safety and toleration of sildenafil 100 mg when co-administered with doxazosin.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

20

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
      • Laguna Woods, California, United States, 92653
        • Pfizer Investigational Site
      • Newport Beach, California, United States, 92660
        • Pfizer 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

35 years to 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  • patients who weighed between 132 and 220 lb (60 and 100 kg) with benign prostatic hyperplasia (BPH)
  • a total PSA (prostate specific antigen) measurement of less than or equal to 10 µg/L within the 12 months prior to screening, were currently on doxazosin treatment for BPH, had been treated with doxazosin for a minimum of 2 months prior to first dose of study medication, and had received a minimum of 4 mg doxazosin once daily (from doxazosin supplied for this study) for 2 weeks prior to the first dose of study medication.

Exclusion Criteria:

  • subjects with a recent history (i.e. within 6 months prior to screening) of stroke or myocardial infarction
  • subjects with severe cardiovascular disorders such as unstable angina or severe congestive heart failure
  • subjects with known hereditary degenerative retinal disorders, such as retinitis pigmentosa
  • subjects with a supine systolic/diastolic blood pressure of >170/100 mmHg or <100/60 mmHg either at screening or at the pre-dose measurements
  • subjects receiving any other antihypertensive therapy other than doxazosin in the 3 weeks prior to the first dose 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: Basic Science
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: Arm 2
Drug: placebo
placebo by mouth as a single dose
Active Comparator: Arm 1
Drug: sildenafil
sildenafil 100 mg by mouth as a single dose

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Pharmacodynamic parameters of blood pressure and pulse rate
Time Frame: immediately predose, 15, 30, and 45 minutes and 1, 1.5, 2, 2.5, 3, 4, 6, and 8 hours postdose
immediately predose, 15, 30, and 45 minutes and 1, 1.5, 2, 2.5, 3, 4, 6, and 8 hours postdose

Secondary Outcome Measures

Outcome Measure
Time Frame
Blood samples for doxazosin pharmacokinetic parameters
Time Frame: time 0 (pre-dose), and at 1, 2, 3, 4, 6, and 8 hours post-dose
time 0 (pre-dose), and at 1, 2, 3, 4, 6, and 8 hours post-dose
Safety and toleration of simultaneously co-administering sildenafil and doxazosin.
Time Frame: continuous
continuous

Collaborators and Investigators

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

Sponsor

Pfizer's Upjohn has merged with Mylan to form Viatris Inc.

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

November 1, 2002

Study Completion (Actual)

July 1, 2003

Study Registration Dates

First Submitted

March 20, 2008

First Submitted That Met QC Criteria

March 26, 2008

First Posted (Estimate)

March 27, 2008

Study Record Updates

Last Update Posted (Actual)

February 1, 2021

Last Update Submitted That Met QC Criteria

January 28, 2021

Last Verified

January 1, 2021

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • A1481163

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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