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The Effect of Xenical on Weight and Risk Factors

This study has been completed.
Information provided by (Responsible Party):
University of British Columbia Identifier:
First received: September 7, 2005
Last updated: March 28, 2013
Last verified: March 2013
The purpose of this study is to determine the effect of using the weight loss medication Xenical (generic name - orlistat) on weight loss and change in heart disease risk factors in patients of the Healthy Heart Program Lipid Clinic at St. Paul's Hospital over a three month period. Xenical works by blocking the body's absorption of dietary fat in the gut, allowing it to pass through to be excreted, therefore reducing the intake of fat and calories. This is a pilot study supported by Hoffmann-La Roche Limited which produces Xenical. The aim is to investigate whether weight loss will also result in reductions in heart disease risk factors that may allow for less of a need for medications controlling lipid levels, hypertension and plasma glucose.

Condition Intervention Phase
Heart Diseases
Drug: Orlistat
Phase 4

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: The Effect of Xenical on Weight, Risk Factors and Burden of Medication

Resource links provided by NLM:

Further study details as provided by University of British Columbia:

Primary Outcome Measures:
  • Weight loss [ Time Frame: three months ]

Secondary Outcome Measures:
  • Lipid profile and insulin, CRP [ Time Frame: three months ]

Enrollment: 25
Study Start Date: June 2005
Study Completion Date: March 2013
Primary Completion Date: March 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Xenical (Orlistat)
Investigating the effectiveness of Xenical on cardiovascular risk factors in the patients of St. Paul's Hospital Lipid Clinic
Drug: Orlistat
See Detailed Description.

Detailed Description:
Obesity is associated with numerous chronic diseases and increased cardiovascular mortality. It is also an independent risk factor for cardiovascular disease (CVD) in addition to being associated with diabetes and CVD risk factors. Weight loss interventions that target body fat reductions are associated with reductions in cholesterol levels, blood pressure and fasting glucose. Xenical (orlistat) is a gastrointestinal lipase inhibitor which results in a reduction in the absorption of exogenous fat. Studies of up to two years duration have demonstrated that those taking Xenical plus diet lost significantly more weight than those taking placebo plus diet. Coincident with this were decreases in cholesterol levels. The use of Xenical in Type 2 diabetic patients being treated with sulfonylurea resulted in greater discontinuation of the sulfonylurea plus a greater reduction in sulfonylurea dosage compared to placebo. The use of Xenical in the clinical environment has the potential to improve CVD risk factors and potentially reduce the burden of other medications.This is a pilot study to investigate the effectiveness of Xenical on cardiovascular risk factors in the patients of St. Paul's Hospital Lipid Clinic.

Ages Eligible for Study:   19 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  1. Body mass index ≥ 27 with one risk factor for cardiovascular disease OR overweight/obese individuals with type 2 diabetes on standard hypoglycemic agents
  2. Recently prescribed Xenical at the St. Paul's Hospital Lipid Clinic

Exclusion Criteria:

  1. Patients with previous experience using Xenical
  2. Patients currently using other weight loss medications.
  3. Unable to provide informed consent.
  4. Less than 19 years of age
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Please refer to this study by its identifier: NCT00152360

Canada, British Columbia
Healthy Heart Program/Lipid Clinic, St. Paul's Hospital
Vancouver, British Columbia, Canada
Sponsors and Collaborators
University of British Columbia
Principal Investigator: Jiri Frohlich, MD University of British Columbia
  More Information

Responsible Party: University of British Columbia Identifier: NCT00152360     History of Changes
Other Study ID Numbers: P03-0151
Study First Received: September 7, 2005
Last Updated: March 28, 2013

Keywords provided by University of British Columbia:
weight loss
cardiovascular risk factors
Obesity and obesity related pathology

Additional relevant MeSH terms:
Heart Diseases
Nutrition Disorders
Body Weight
Signs and Symptoms
Cardiovascular Diseases
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Anti-Obesity Agents processed this record on May 23, 2017