Dutasteride (GI198745) In Benign Prostatic Hyperplasia Subjects

Condition(s) targeted: Prostatic Hyperplasia

Intervention: Dutasteride (Drug); Placebo (Drug)

Phase: Phase 3

Status: Completed

Sponsored by: GlaxoSmithKline

Official(s) and/or principal investigator(s):
GSK Clinical Trials, Study Director, Affiliation: GlaxoSmithKline

This study will assess the efficacy and safety of GI198745 0. 5mg given once daily for 52 weeks to Benign Prostatic Hyperplasia (BPH) patients.

Official title: Clinical Evaluation of Dutasteride in Benign Prostatic Hyperplasia: A Randomized, Double-Blind, Placebo-Controlled, Parallel Group Comparative Study of GI198745 (Dutasteride) in Subjects With Benign Prostatic Hyperplasia.

Study design: Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment

Primary outcome: Change From Baseline in International Prostate Symptom Score (IPSS) at Week 52

Secondary outcome:

Percent Change From Baseline in Prostate Volume at Week 52

Number of Participants With IPSS Improvement From Baseline at Week 52

Change From Baseline in Maximum Urine Flow Rate (Qmax) at Week 52

Number of Participants With Qmax Improvement From Baseline at Week 52

Minimum age: 50 Years. Maximum age: N/A. Gender(s): Male.

Criteria:

Inclusion Criteria: Only subjects who meet all the following criteria during the screening phase will be enrolled in the study. 1. Diagnosis: BPH 2. Age: ≥50 years 3. Gender: Male 4. Estimated prostate volume ≥30cc (by TRUS) 5. I-PSS Symptom Score (total of 7 items) ≥8 points 6. Maximum flow rate (Qmax) ≤15mL/sec (voided volume measured simultaneously ≤150mL)*[1] 7. Patients who meet either of the following regarding tamsulosin HCl use: Patients with tamsulosin HCl use: Patients who have received tamsulosin HCl continuously for at least 4 weeks and who are likely to continue to take tamsulosin HCl without any change to the dosage and administration of the drug until the end of study treatment. Patients without tamsulosin HCl use: Patients who haven't received tamsulosin HCl in the past 4 weeks and who are unlikely to use tamsulosin HCl until the end of study treatment. 8. Outpatients 9. Patients who in person have given written consent Exclusion Criteria: Patients who apply to any of the following criteria during the screening phase will not be enrolled in the study. 1. Post void residual volume >250mL (by suprapubic ultrasound). 2. History of AUR within the previous 12 weeks. 3. Evidence or history of prostate cancer. 4. PSA >10ng/mL [in patients with PSA >4ng/mL, the presence of prostate cancer should be ruled out by the investigator/subinvestigator. DRE and free/total PSA ratio should be considered, and prostate biopsy be conducted if necessary]. 5. Previous surgery (including balloon dilatation, thermotherapy and stent placement) or minimally invasive techniques for BPH. 6. Any causes other than BPH, which may in the judgment of the investigator/subinvestigator, affect evaluation of symptoms or urine flow (e. g., neurogenic bladder, bladder neck contracture, urethral stricture, bladder malignancy, acute/chronic prostatitis, acute/chronic urinary tract infection). 7. History of any unstable, serious co-existing medical condition(s) including, but not limited to, myocardial infarction, coronary bypass surgery, unstable angina, cardiac arrhythmias*[2], congestive heart failure or cerebrovascular accident within the previous 6 months; or diabetes mellitus or peptic ulcer uncontrollable with medical treatment. 8. Liver function tests (AST, ALT, AL-P) >2 times the upper limit of normal. 9. Serum cleatinine >1. 8mg/dL. 10. Use of any antiandrogen (e. g., chlormadinone acetate, allylesterenol) for BPH within the previous 12 months. 11. Use of a1-adrenoceptor blockers excluding tamsulosin HCl (e. g., prazosin HCl, urapidil slow-release capsule formulation, terazosin HCl, naftopidil), plant extract preparations for treatment of BPH (e. g., Eviprostat, cernitin pollen extract), herbal medicines (e. g., hachimi-jio-gan, gosha-jinki-gan), other drugs (e. g., Paraprost), and dietary or herbal supplements (e. g., saw palmetto) for relief of BPH symptoms within the previous 4 weeks. Use of a-adrenoceptor agonists (e. g., pseudoephedrine, phenyle

- [1] Subjects with voided volume <150 mL at Qmax measurement cannot be enrolled in the

study and may undergo re-measurement of Qmax before the visit for Week 0 for study entry.

- [2] Of "Degree II" according to "Grading of Side Effects (PMSB Notification No. 80

dated June 29, 1992) or equivalent (Appendix 4).

GSK Investigational Site, Chiba 263-0043, Japan

GSK Investigational Site, Chiba 266-0031, Japan

GSK Investigational Site, Chiba 272-0107, Japan

GSK Investigational Site, Fukuoka 802-0077, Japan

GSK Investigational Site, Fukuoka 810-0001, Japan

GSK Investigational Site, Fukuoka 830-0027, Japan

GSK Investigational Site, Hyogo 660-0052, Japan

GSK Investigational Site, Kanagawa 245-0015, Japan

GSK Investigational Site, Kanagawa 226-0025, Japan

GSK Investigational Site, Kanagawa 229-1103, Japan

GSK Investigational Site, Kanagawa 215-0021, Japan

GSK Investigational Site, Kanagawa 252-0804, Japan

GSK Investigational Site, Kanagawa 259-1132, Japan

GSK Investigational Site, Kyoto 604-8436, Japan

GSK Investigational Site, Oita 871-0012, Japan

GSK Investigational Site, Oita 874-0937, Japan

GSK Investigational Site, Osaka 584-0074, Japan

GSK Investigational Site, Osaka 562-0036, Japan

GSK Investigational Site, Osaka 542-0073, Japan

GSK Investigational Site, Tokyo 186-0011, Japan

GSK Investigational Site, Tokyo 130-0026, Japan

GSK Investigational Site, Tokyo 131-0032, Japan

GSK Investigational Site, Tokyo 150-0002, Japan

GSK Investigational Site, Tokyo 152-0001, Japan

GSK Investigational Site, Tokyo 153-0051, Japan

GSK Investigational Site, Tokyo 183-0044, Japan

Related publications:

Tsukamoto T, Endo Y, Narita M. Efficacy and safety of dutasteride in Japanese men with benign prostatic hyperplasia. Int J Urol. 2009 Sep;16(9):745-50. doi: 10.1111/j.1442-2042.2009.02357.x. Epub 2009 Aug 5.

Starting date: February 2006
Last updated: April 17, 2014