Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Evaluation Of The Efficacy And Safety Of The Doxasozin Gastrointestinal Therapeutic System (GITS) In Patients With Prostate Enlargement

This study has been completed.
Information provided by:
Pfizer Identifier:
First received: March 27, 2008
Last updated: April 2, 2008
Last verified: March 2008
The primary objectives were to determine the efficacy and safety of the GITS formulation of Doxazosin in Taiwanese patients with prostate enlargement.

Condition Intervention Phase
Drug: Doxazosin mysylate GITS
Phase 4

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Prospective, Open-Labeled Trial of the Safety and Efficacy of Doxazosin GITS in Patients With Benign Prostate Hyperplasia

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Change in the maximum urinary flow rate (Qmax) from baseline [ Time Frame: 8 weeks ]
  • Change in the International Prostate Symptom Score (IPSS) total score from baseline [ Time Frame: 8 weeks ]

Secondary Outcome Measures:
  • Change in the International Prostate Symptom Score (IPSS) total score from baseline [ Time Frame: 4 weeks ]
  • Change in the maximum urinary flow rate (Qmax) from baseline [ Time Frame: 4 weeks ]
  • Change in the quality of life (QoL) assessment index score from baseline [ Time Frame: 8 weeks ]

Enrollment: 80
Study Start Date: November 2003
Study Completion Date: January 2005
Arms Assigned Interventions
Experimental: A Drug: Doxazosin mysylate GITS
Subjects initiated on 4 mg doxazosin GITS once daily at Visit 1 for four weeks. At Visit 2 (Week 4) increased to 8 mg Doxazosin GITS if efficacy response criteria not met.


Ages Eligible for Study:   50 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Taiwanese male subjects between 50 and 80 years of age who had: a primary diagnosis of BPH, defined as having an enlarged prostate (confirmed by digital rectal examination [DRE] and/or B-mode ultrasound); an IPSS score of ≥12; and a Qmax in the range of 5 to 15 mL/sec in a total voided volume of ≥150 mL, were eligible for the study.

Exclusion criteria include but not limited to:

  • Previous prostate surgery, presence of a prostate stent or microwave thermotherapy and/or balloon dilatation within the previous 6 months
  • Concomitant therapy or previous therapy within 14 days with agents known to affect bladder or urethral function.
  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 identifier: NCT00648323

Pfizer Investigational Site
Kaohsiung, Taiwan, 813
Pfizer Investigational Site
Taichung, Taiwan
Pfizer Investigational Site
Taipei, Taiwan
Pfizer Investigational Site
Taoyuan, Taiwan
Sponsors and Collaborators
Study Director: Pfizer Call Center Pfizer
  More Information

Additional Information:
Responsible Party: Director, Clinical Trial Disclosure Group, Pfizer Identifier: NCT00648323     History of Changes
Other Study ID Numbers: A0351063
Study First Received: March 27, 2008
Last Updated: April 2, 2008

Keywords provided by Pfizer:
Benign Prostate Hyperplasia

Additional relevant MeSH terms:
Prostatic Hyperplasia
Prostatic Diseases
Genital Diseases, Male
Antihypertensive Agents
Adrenergic alpha-1 Receptor Antagonists
Adrenergic alpha-Antagonists
Adrenergic Antagonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs processed this record on April 28, 2017