Dutasteride After Failure of Finasteride In the Management of Symptomatic Prostatic Enlargement/Hypertrophy (BPE/H)

Study Overview
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Brief Summary
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The study is to determine the safety and efficacy of Dutasteride in patients who have failed Finasteride therapy for their symptomatic benign prostatic enlargement/ hypertrophy (BPE/H).

Detailed Description
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STUDY SUMMARY TITLE: A Pilot Investigation of Dutasteride (Avodart) After Failure of Finasteride (Proscar) in the Management of Symptomatic Prostatic Enlargement/Hypertrophy OBJECTIVE: To determine the safety and efficacy of Dutasteride in patients who have failed Finasteride therapy for their symptomatic benign prostatic enlargement/ hypertrophy (BPE/H) EXPERIMENTAL PLAN: PATIENT SELECTION: Inclusion Criteria Patients who demonstrate clinical evidence of failure after treatment with Finasteride for 12 or more months. Failure includes one or more of the following: (i) AUA SS > 10; (ii) Q-max < 10 cc/sec; (iii) Post void residual volume (PVR) >200cc. Patients who remain subjectively symptomatic of LUTS secondary to BPH after treatment with Finasteride for at least six months. Exclusion Criteria Patients with Neurogenic Bladder/LUTS secondary to neurologic disease Patients with the diagnosis of prostate cancer Patients with an allergy to Finasteride/Dutasteride STUDY DESIGN AND DURATION: This will be a single institution, open label pilot study involving 26 patients over 18-24 months. Each patient will be treated with the standard dose of Dutasteride for at least twelve months and followed for an additional 12 months. EFFICACY AND SAFETY MEASUREMENTS: Improvement in flowmetry, AUASS and PVR will be the primary outcome measures of efficacy. Quality of life measurement will be made also. The exploratory measures will include PSA and prostate volume. All adverse events including tolerability of the test agent will be recorded. SUMMARY: A positive result showing objective (AUASS, Q-max, PVR) and subjective (satisfaction index) improvement in these previously treated patients should engender interest in a multicenter study to confirm our data. The clinical import is that this population should be switched to Dutasteride without prolonged treatment with Finasteride for no additional benefit to the patient. A failure of treatment with one hormonal agent does not necessarily imply a lack of response to another agent of the same class.

Official Title
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A Pilot Investigation of Dutasteride (Avodart) After Failure of Finasteride (Proscar) In the Management of Symptomatic Prostatic Enlargement/Hypertrophy (BPE/H)

Conditions
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Benign Prostatic Hypertrophy

Intervention / Treatment
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* Drug: Dutasteride


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male with history of treatment with Finasteride for more than six months, and who demonstrate clinical evidence of failure (subjective symptoms of bladder outlet obstruction secondary to BPH-related LUTS; objective evidence: AUASS> 10;Q-max > 5cc/sec and <10c/sec (total voided volume of at least 125cc); post void volumes > 200cc) Prostate volume > 30cc and < 80cc by transrectal ultrasound measurement Total Serum PSA of < 15 ng/ml (corrected for Finasteride therapy) Willingness and ability to give written informed consent and comply with study instructions and procedures. Exclusion Criteria: Clinical evidence of non-response to therapy with Finasteride for symptomatic BPH. Total serum corrected PSA of greater than 15 ng/ml History or clinical evidence of prostate cancer History of acute urinary retention in three months prior.

Ages Eligible for Study
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Minimum Age: 50 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: study drug<br>Open label, single arm | Drug: Dutasteride<br>* once daily dosing of 0.5mg Dutasteride for 12 months<br>* Other names: Avodart;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Urodynamic parameters (Qmax, Voided volume, and PVR) and AUASS |  | 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To assess safety and tolerability of Dutasteride |  | 12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Benign Prostatic Enlargement, Benign Prostatic Hypertrophy, Dutasteride, 5-alpha reductase inhibitors, Hormonal therapy