Bioavailability of Two Combination Products of Dutasteride (0.5mg) and Tamsulosin Hydrochloride (0.2mg) in Asian Males.

Summary

This study aims to determine the relative bioavailability of tamsulosin hydrochloride in a fixed dose combination capsule of dutasteride and tamsulosin hydrochloride (0.5 mg/0.2 mg) relative to co-administration of dutasteride 0.5 mg capsules and tamsulosin hydrochloride 0.2 mg tablets or capsules. Two fixed dose combination capsules will be tested; one will contain tamsulosin hydrochloride pellets with a 15% enteric coating, and the other tamsulosin hydrochloride pellets with a 10% enteric coat. In addition, two formulations of tamsulosin hydrochloride will be tested in the co-administration with dutasteride 0.5 mg; a 0.2 mg oral disintegrating tablet and a 0.2 mg hard shell capsule. This will be an open-label, randomized, single dose, four-period crossover in healthy male subjects of North East Asian ancestry. Subjects will receive single oral doses in four treatment periods, each separated by a 5-10 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 and review of adverse events. The study will enrol approximately 30 healthy male subjects to ensure that 24 complete the study.

Timeline

Start

2011-06-30

Primary completion

2011-09-07

Completion

2011-09-07

Publications

• Background AVODART (Dutasteride 0.5 mg) Product Information. February, 2009.
• Background FLOMAX (Tamsulosin hydrochloride) Product Information. January, 2011.
• Background GlaxoSmithKline Document Number 2011N112801_00 Study ID ARI114694. GlaxoSmithKline studyARI114694: 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 (0.5 mg/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;. Report Date 02-May-2011.
• Background GlaxoSmithKline Document Number HM2002/00171/01 Study ID ARI40005. 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;. Report Date 09-Jul-2004.
• Background GlaxoSmithKline Document Number ZM2007/00022/00 Study ID 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 0.4 mg Commercial Capsules in Healthy Male Subjects. Report Date 30-Aug-2007.
• Background HARNAL (Tamsulosin hydrochloride 0.2 mg) Product Information. , 2011.
• Background HARNAL-D (Tamsulosin hydrochloride 0.2 mg) Product Information. , 2009.
• 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). 167 (4):265, 2002. J. Urology. 2002;167 (4):265.

Drugs

Indications