A Study to Determine the Bioavailability of a Fixed Dose Combination Product of Dutasteride (0.5mg) and Tamsulosin Hydrochloride (0.2mg) Relative to Co-administration of the Individual Components in Healthy Male Subjects of North East Asian and Non-Asian Ancestry.

Summary

This study will be an open-label, randomized, single dose, two-period crossover study to determine the bioavailability of a fixed dose combination capsule formulation of dutasteride and tamsulosin hydrochloride (0.5mg/0.2mg) relative to co-administration of dutasteride 0.5mg capsules and tamsulosin hydrochloride 0.2mg tablets in healthy male subjects of North East Asian and non-Asian ancestry. Subjects will receive single oral doses of a combination capsule formulation of dutasteride 0.5 mg/ tamsulosin 0.2 mg in a fed or fasted state or concomitant dosing of dutasteride 0.5 mg and the Japan-sourced Harnal-D 0.2 mg in a fed or fasted state. Each dose of study medication will be separated by a 28-day washout period. Blood samples for pharmacokinetic analysis will be taken at regular intervals after dosing. Safety will be assessed by measurement of blood pressure, heart rate, safety laboratory data, and review of adverse events. The study will enrol 88 healthy male subjects to ensure that 80 complete the study. At least twenty percent of the study population will be of Japanese ancestry, approximately 20% will be of Chinese ancestry and approximately 20% of Korean ancestry while the remainder of the population will be of non-Asian ancestry.

Timeline

Start

2010-09-10

Primary completion

2010-12-21

Completion

2010-12-21

Publications

• Background Flomax (Tamsulosin hydrochloride) Product Information for the USA, 2009
• Background GlaxoSmithKline Document Number ZM2007/00022/00. ARI109882. An Open-Label, Randomized, Single Dose, Three-Period Crossover Study to Determine the Bioequivalence and Food Effect of a Combination Capsule Formulation of Dutasteride and Tamsulosin Hydrochloride (0.5mg/0.4mg) Compared to Concomitant Dosing of AVODART 0.5mg and Flomax 0.4mg Commercial Capsules in Healthy Male Subjects, August 2007
• Background GlaxoSmithKline studyARI40005: A randomised, double-blind, parallel group study to investigate the efficacy and safety of treatment with Dutasteride (0.5mg) and Tamsulosin (0.4mg), administered once daily for 4 years, alone and in combination, on the improvement of symptoms and clinical outcome in men with moderate to severe symptomatic benign prostatic hyperplasia; [GlaxoSmithKline Document Number HM2002/00171/01].
• Background Harnal capsule (Tamsulosin hydrochloride), 0.4mg Product Information for Australia, 2009b.
• Background Harnal D (Tamsulosin hydrochloride), extended release tablet, 0.2mg Product Information for Hong Kong, 2009a.
• Background Matsushima H, Kamimura H, Soeishi Y, Watanabe T, Higuchi S, Tsunoo M. Pharmacokinetics and plasma protein binding of tamsulosin hydrochloride in rats, dogs, and humans. Drug Metab Dispos. 1998 Mar;26(3):240-5.
• Background McConnell JD. The long term effects of medical therapy on the progression of BPH: Results from the MTOPS Trial (abstract 1042). J. Urology 167 (4):265, 2002.

Drugs

Indications