A Study of 3 Doses of Dextofisopam in Females With Irritable Bowel Syndrome

Phase 2

Completed

• Conditions: Irritable Bowel Syndrome
• Interventions: Drug: Dextofisopam

• Registration Number: NCT00486876
• Lead Sponsor: Pharmos

Brief Summary

The primary objectives of this study are to evaluate the clinical safety and tolerability and to assess the efficacy of 100 mg, 200 mg, and 300 mg BID dextofisopam compared with placebo in female outpatients with diarrhea-predominant or alternating irritable bowel syndrome (IBS).

Detailed Description

This is a double-blind, randomized , placebo-controlled Phase 2b study of the safety, tolerability, and efficacy of 100, 200 and 300 mg BID dextofisopam in female patients suffering from diarrhea-predominant or alternating-Irritable Bowel Syndrome. (d-IBS or a-IBS.) Approximately 120 patients will be enrolled in each of the 4 arms of the study which will be conducted in up to 70 clinical sites in the USA. The patients will; be stratified by diagnosis.

Outpatient females, 18 to 65 years old will be enrolled in the study if diagnosed with d-IBS or a-IBS after having been screened during up to 17 days prior to enrollment (including colonoscopy if not done within the last 5 years) and found to have no organic disease that might have caused their complaints of abdominal pain or discomfort which when started was associated with a change in stool frequency or form and/or improves with defecation.

Patients will be instructed to take 3 capsules of the blinded study drug twice a day by mouth and to record by an interactive voice response system (IVRS ) any change in their symptoms. Patients who meet all the Inclusion and Exclusion criteria will be evaluated at baseline (one day prior to taking study drug ) including laboratory determinations including a pregnancy test for women of childbearing potential, vital signs, electrocardiogram ( ECG), recording of adverse events(AE's) and filling out the IBS Quality of Life Questionnaire( IBSQOL ), the Work Productivity and Activity Impairment Questionnaire-IBS Version ( WPAI:IBS )and the Hospital l Anxiety and Depression Questionnaire ( HAD).

Enrolled patients will have 12 weeks of double-blind treatment followed by a 28 day post treatment period.

Symptoms will be recorded daily

. Patients will visit the investigating site at weeks 4, 8 and 12 after the baseline visit and the procedures performed at baseline will be repeated A post treatment visit will occur 28 days after discontinuing study drug. Vital signs, AE's, concomitant medications and daily and weekly symptom assessment via IVRS will be recorded.

Study Timeline

• Study Start: 2007-06
• Study First Submitted: 2007-06-13
• Study First Submitted QC: 2007-06-14
• Study First Posted: 2007-06-15
• Primary Completion: 2009-09
• Study Completion: 2009-10
• Status Verified: 2011-08
• Last Update Submitted: 2011-08-01
• Last Update Posted: 2011-08-02

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 324

Inclusion Criteria

• 1. Outpatient post-menopausal or no pregnant females,18 to 65 years old
• 2. Irritable bowel syndrome, which meet the Rome III criteria for IBS of the diarrhea-predominant or the alternating subtype
• 3. Able to give informed consent
• 4 Willingness to make daily calls on a touch-tone telephone

Exclusion Criteria

• 1. Clinically significant abnormality on the screening tests.
• 2. Use of any other investigational drug within 30 days before screening visit.
• 3. Serious underlying diseases, including psychiatric disorders or current history of conditions affecting bowel habits
• 4. Previous treatment with tofisopam Related drugs.
• 5. History or presence of clinically significant medical disease that might compromise the study or be detrimental to the patient, such as
• 6. Subject has exclusively constipation-predominant IBS.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
4	Dextofisopam	300 mg BID
2	Dextofisopam	100 mg BID
3	Dextofisopam	200 mg BID
1	Dextofisopam	Placebo

Primary Outcome Measures

Name	Time	Method
The percentage of weeks for which patients record adequate overall relief of IBS symptoms during the double blind period (12 weeks of treatment).	June 07 thru August 09

Trial Locations

Locations (77)

Alliance Clinical Research; 🇺🇸 Birmingham, Alabama, United States

Clinical Research Associates; 🇺🇸 Huntsville, Alabama, United States

Mobile Medical and Diagnostic Center; 🇺🇸 Mobile, Alabama, United States

Radiant Research, Phoenix Southwest; 🇺🇸 Chandler, Arizona, United States

Mayo Clinic Arizona; 🇺🇸 Scottsdale, Arizona, United States

Arkansas Gastroenterology; 🇺🇸 Sherwood, Arkansas, United States

Providence Clinical Research; 🇺🇸 Burbank, California, United States

Discovery Clinical Research; 🇺🇸 Encinitas, California, United States

Digestive and Liver Disease Specialists; 🇺🇸 Garden Grove, California, United States

Community Clinical Trials; 🇺🇸 Orange, California, United States

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