An Effectiveness and Safety Study Comparing Oxybutynin Chloride Plus FLOMAX (Tamsulosin HCl) and Placebo Plus FLOMAX (Tamsulosin HCl) for the Treatment of Lower Urinary Tract Symptoms.

Overview

The purpose of this study is to evaluate the safety and effectiveness of oxybutynin extended release tablets 10 mg plus tamsulosin HCl 0.4 mg in the treatment of lower urinary tract symptoms as measured by change of the total International Prostate Symptom Score (I-PSS) from baseline to Week 12 or the Final Visit.

Full Title of Study: “A Double-Blind, Randomized, Parallel Group Trial of Ditropan XL (Oxybutynin Chloride) Extended Release Tablets or Placebo in Combination With FLOMAX (Tamsulosin Hydrochloride) for the Treatment of Lower Urinary Tract Symptoms.”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: Double

Detailed Description

The objective of this double-blind (neither the patient nor the physician knows whether drug or placebo is being taken, or at what dosage), randomized (patients are assigned different treatments based on chance), parallel group trial is to evaluate the safety and effectiveness of oxybutynin extended release tablets 10 mg per day for 12 weeks in conjunction with an alpha-blocker for the treatment of lower urinary tract symptoms (LUTS). The hypothesis of the study is that oxybutynin extended release tablets 10 mg plus tamsulosin 0.4 mg will be more effective than tamsulosin 0.4 mg plus placebo in the treatment of lower urinary tract symptoms as measured by change of the total International Prostate Symptom Score (I-PSS) from baseline to Week 12 or the Final Visit. Safety assessments include Peak Flow Rate (PFR) and Post-Void Residual (PVR) volume, adverse events, vital signs and physical exams. Patients will receive oxybutynin extended release 10 mg plus tamsulosin 0.4 mg or placebo plus tamsulosin 0.4 mg every day for 12 weeks.

Interventions

  • Drug: oxybutynin chloride extended release

Clinical Trial Outcome Measures

Primary Measures

  • Change of the total International Prostate Symptom Score (I-PSS) from baseline to Week 12 or the Final Visit.

Secondary Measures

  • At all timepoints assessed and final visit: I-PSS (total score, irritative component score, quality of life score); Symptom Problem Index score; Urgency and frequency scales scores; Incontinence Indicator scale score

Participating in This Clinical Trial

Inclusion Criteria

  • Diagnosis of lower urinary tract symptoms with urgency and frequency with or without urge incontinence – have had at least 4 weeks of 0.4 mg/day tamsulosin therapy – an International Prostate Symptom Score (I-PSS) >=13 – irritative component I-PSS score >= 8 – max flow >= 8ml/sec with voided volume >= 125 ml, post-void residual volume <= 150 ml on two occasions. Exclusion Criteria:

  • Clinically significant medical problems or other organ abnormality or pathology – Prostate-Specific Antigen (PSA) >= 4 ng/ml – history of inability to empty bladder completely or not at all – uncontrolled narrow angle glaucoma – history of any prostate surgery or treatment – history of significant gastrointestinal problems.

Gender Eligibility: Male

Minimum Age: 45 Years

Maximum Age: N/A

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • McNeil Consumer & Specialty Pharmaceuticals, a Division of McNeil-PPC, Inc.
  • Overall Official(s)
    • McNeil Consumer & Specialty Pharmaceuticals, a Division of Mc Neil-PPC, Inc. Clinical Trial, Study Director, McNeil Consumer & Specialty Pharmaceuticals, a Division of McNeil-PPC, Inc.

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