A Study to Evaluate How Tamsulosin (at 1 Dose) and Solifenacin (at 2 Different Doses) Are Taken up From the Intestine, Distributed Through the Body and Eliminated From the Body When Administered in Combination as a Single Tablet (Called EC905)

An Open-label, Randomized, Two-way Crossover, Multiple Dose Study to Evaluate the Steady State Pharmacokinetics of the Two Final Combination Tablet Formulations (EC905; Tamsulosin HCl/ Solifenacin Succinate; 0.4 mg/6 mg and 0.4 mg/9 mg) in Healthy Male Volunteers Over 45 Years of Age

Tamsulosin (sold under the name Omnic OCAS) is used for treatment of voiding complaints related to an enlarged prostate. Solifenacin (sold under the name Vesicare) is used for the treatment of patients suffering from problems related to overactive bladder, such as needing to go to the toilet frequently and often having a sudden urgent need to go to the toilet. Certain patients with an enlarged prostate have complaints that may benefit from a combination of tamsulosin and solifenacin. EC905 is a single tablet containing both tamsulosin and solifenacin. The current study aims at investigating how tamsulosin and solifenacin are taken up from the intestine, distributed through the body and eventually eliminated from the body when taken as a single EC905 tablet.

Study Overview

• Status: Completed
• Conditions: Healthy Subjects; Pharmacokinetics; EC905; Multiple Dose
• Intervention / Treatment: Drug: EC905

Detailed Description

In this study there are two sequence groups with 27 subjects in total. In Period 1, subjects are randomized to receive one of the two final combination tablet formulations of tamsulosin HCl and solifenacin succinate. In Period 1, 13 subjects receive one combination and 14 subjects receive the other combination. In Period 2, the alternate treatment is provided.

Screening takes place from Days -21 to -2 before the first admission day (Day -1). EC905 is administered from Day 1 to Day 12 (treatment period 1), and from Day 13 to Day 24 (treatment period 2). All treatments are administered with subjects in the fasted state.

Blood samples for pharmacokinetic (PK) analysis of tamsulosin HCl and solifenacin free base are collected, and assessments of vital signs, safety electrocardiogram (ECG), safety laboratory, adverse events and concomitant medications are performed.

Subjects are discharged on day 25 and an End of Study Visit takes place at least 10 days after the second treatment period, or after withdrawal.

• Study Type: Interventional
• Enrollment (Actual): 27
• Phase: Phase 1

Contacts and Locations

Study Locations

• United Kingdom
  • Harrow, United Kingdom, H1 3UJ
    • PAREXEL Early Phase Clinical Unit

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 43 years to 78 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Male

Description

Inclusion Criteria:

• Body Mass Index between 18.5 and 30.0 kg/m2, inclusive.

Exclusion Criteria:

• Known or suspected hypersensitivity to tamsulosin HCl, solifenacin succinate, EC905 or any of the components of the formulations used.
• Any of the contraindications or precautions for use as mentioned in the applicable sections of the Summary of Product Characteristics (SPC) of tamsulosin or solifenacin.
• Use of grapefruit (more than 3 x 200 ml) or marmalade (more than three times) in the week prior to admission to the clinic.
• Any of the liver function tests (i.e. ALT, AST) above the upper limit of normal.
• Any clinically significant history of asthma, eczema, any other clinically significant allergic condition or previous severe hypersensitivity to any drug (excluding non-active hay fever).
• Any of the contraindications or precautions for use as mentioned in the applicable sections of the SPC's of tamsulosin or solifenacin.
• Abnormal pulse rate and/or blood pressure measurements at the pre-study visit as follows: pulse rate <40 or >90 bpm; mean systolic blood pressure >160 mmHg; mean diastolic blood pressure >100 mmHg (blood pressure measurements taken in triplicate after subject has been resting in supine position for at least 5 min; pulse rate will be measured automatically).
• A QT interval after repeated measurements of >430 ms, a history of unexplained syncope, cardiac arrest, unexplained cardiac arrhythmias or torsades de pointes, structural heart disease, or a family history of Long QT Syndrome (LQTS).
• Use of any prescribed or OTC (over-the-counter) drugs (including vitamins, natural and herbal remedies, e.g. St. John's wort) in the 2 weeks prior to admission to the Clinical Unit, except for paracetamol (up to 3 g/day).
• Regular use of any inducer of liver metabolism (e.g. barbiturates, rifampicin) in the 3 months prior to admission to the Clinical Unit.
• Any use of drugs of abuse within 3 months prior to admission to the Clinical Unit.
• History of smoking more than 10 cigarettes (or equivalent amount of tobacco) per day within 3 months prior to admission to the Clinical Unit.
• History of drinking more than 21 units of alcohol per week (1 unit = 10 g pure alcohol = 250 ml of beer (5%) or 35 ml of spirits (35%) or 100 ml of wine (12%)) within 3 months prior to admission to the Clinical Unit.
• Donation of blood or blood products within 3 months prior to admission to the Clinical Unit.
• Positive serology test for HBsAg, anti HAV (IgM), anti-HCV or anti-HIV 1+2.
• Participation in any clinical study within 3 months or participation in more than 3 clinical studies within 12 months, prior to the expected date of enrolment into the study, provided that the clinical study did not entail a biological compound with a long terminal half life
• Employee of the Astellas Group or CRO involved in the study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: 1: Low dose EC905	Drug: EC905; Oral; Other Names: tamsulosin HCl and solifenacin succinate
Experimental: 2: High dose EC905	Drug: EC905; Oral; Other Names: tamsulosin HCl and solifenacin succinate

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Pharmacokinetic profile of tamsulosin HCl by Area Under the Curve during the time interval between consecutive dosing	Area under the plasma concentration - time curve during the time interval between consecutive dosing (AUCtau)	Days 10-12 and Days 13, 22-25 (26 times)
Pharmacokinetic profile of tamsulosin HCl by Maximum concentration	Maximum concentration ( Cmax)	Days 10-12 and Days 13, 22-25 (26 times)
Pharmacokinetic profile of solifenacin succinate by Area Under the Curve during the time interval between consecutive dosing	Area under the plasma concentration - time curve during the time interval between consecutive dosing (AUCtau)	Days 10-12 and Days 13, 22-25 (26 times)
Pharmacokinetic profile of solifenacin succinate by Cmax (Maximum concentration)	Maximum concentration ( Cmax)	Days 10-12 and Days 13, 22-25 (26 times)

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Pharmacokinetics profile of tamsulosin HCl concentration: Observed trough concentration, Peak Trough Ratio, time to attain Cmax,and apparent total body clearance	Observed trough concentration (Ctrough), Peak Trough Ratio (PTR), time to attain Cmax (tmax), apparent total body clearance (CL/F)	Days 10-12 and Days 13, 22-25 (26 times)
Pharmacokinetics profile of solifenacin succinate concentration: Observed trough concentration, Peak Trough Ratio, time to attain Cmax,and apparent total body clearance	Observed trough concentration (Ctrough), Peak Trough Ratio (PTR), time to attain Cmax (tmax), apparent total body clearance (CL/F)	Days 10-12 and Days 13, 22-25 (26 times)
Safety and tolerability of EC905	Adverse events, ECG, vital signs, safety laboratory assessments, physical examination	Day -21 to End of Study Visit

Collaborators and Investigators

• Sponsor: Astellas Pharma Europe B.V.

Publications and helpful links

Helpful Links

• Link to Results on JAPIC

Study record dates

Study Major Dates

• Study Start: April 1, 2010
• Primary Completion (Actual): July 1, 2010
• Study Completion (Actual): July 1, 2010

Study Registration Dates

• First Submitted: September 26, 2013
• First Submitted That Met QC Criteria: September 26, 2013
• First Posted (Estimate): October 1, 2013

Study Record Updates

• Last Update Posted (Estimate): May 29, 2014
• Last Update Submitted That Met QC Criteria: May 28, 2014
• Last Verified: May 1, 2014

More Information

Terms related to this study

• Keywords: Phase I; Steady-state; Combination tablet EC905; Vesomni; VesiFlow; Urizia
• Additional Relevant MeSH Terms: Physiological Effects of Drugs; Adrenergic Antagonists; Adrenergic Agents; Neurotransmitter Agents; Molecular Mechanisms of Pharmacological Action; Muscarinic Antagonists; Cholinergic Antagonists; Cholinergic Agents; Urological Agents; Adrenergic alpha-1 Receptor Antagonists; Adrenergic alpha-Antagonists; Tamsulosin; Solifenacin Succinate
• Other Study ID Numbers: 905-CL-053; 2009-015078-36 (EudraCT Number)