We updated the design of this site on December 18, 2017. Learn more.
ClinicalTrials.gov Menu

A Study on Efficacy and Safety of Topiramate in the Treatment of Patients With Obesity

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00236639
Recruitment Status : Completed
First Posted : October 12, 2005
Last Update Posted : April 28, 2010
Information provided by:

Study Description
Brief Summary:
The purpose of this study is to compare the efficacy and safety of topiramate (96, 192, and 256mg daily) with placebo in long-term treatment of obesity.

Condition or disease Intervention/treatment Phase
Obesity Drug: topiramate Phase 3

Detailed Description:
Topiramate is not approved for the treatment of obesity. This double-blind, placebo-controlled study assesses long-term effectiveness and safety of topiramate in patients with obesity. After completing 6 weeks of run-in phase (a single-blind placebo-treatment phase during which patients begin non-pharmacological therapy), patients will be randomized to receive either topiramate or placebo. Topiramate group will receive 16mg of topiramate and the dose will be titrated over 8 weeks. Patients will then receive two years of treatment. Effectiveness will be evaluated by body weight, Body Mass Index (BMI), anthropometric measurements (waist circumference, hip circumference, waist/hip ratio), fasting lipid profile, fasting plasma glucose, HbA1c, fasting uric acid, fasting insulin, blood pressures, body fat compositions, mass of left ventricle of the heart (as measured by echocardiography), and Health Related Quality of Life scores. Safety evaluation (incidence of adverse events, laboratory tests, electrocardiogram, vital signs) will be performed throughout the study. The study hypothesis is that topiramate will be effective in achieving and maintaining weight reduction in obese patients. During the initial 8 weeks, the doses of topiramate or placebo will be gradually increased to the target dose (either 96mg, 192mg, or 256mg daily by mouth) and the doses will be maintained for 2 years.

Study Design

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 1293 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: A Randomized, Double-Blind, Placebo-Controlled, Multicenter, Parallel Group, Dose-Response Study to Assess the Efficacy and Safety of Topiramate in the Treatment of Patients With Obesity
Study Start Date : July 2000
Study Completion Date : June 2002

Resource links provided by the National Library of Medicine

Drug Information available for: Topiramate
U.S. FDA Resources

Arms and Interventions

Outcome Measures

Primary Outcome Measures :
  1. The percent change in body weight from the baseline (randomization) to Week 60 (after one year of maintenance therapy).

Secondary Outcome Measures :
  1. Changes from either baseline to Week 60 and/or Week 112, or enrollment to Week 60 and/or Week 112 in absolute body weight, Body Mass Index (BMI), body measurements, fasting lipid profile.

Eligibility Criteria

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   18 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Body Mass Index (BMI) >= 30 and < 50
  • BMI >= 27 and < 50 if patient has controlled hypertension or abnormal blood lipids
  • Stable weight
  • Female patients must be postmenopausal for at least 1 year, surgically incapable of childbearing, practicing abstinence, or practicing an acceptable method of contraception (requires negative pregnancy test)

Exclusion Criteria:

  • Known contraindication, or hypersensitivity to topiramate
  • A diagnosis of diabetes (except those diagnosed during the enrollment if no medications are needed)
  • History or evidence of clinically significant liver, disease, cardiovascular disease, uncontrolled hypertension or high thyroid levels
  • History of obesity with known cause
  • History of weight loss surgery or liposuction
  • History of malignancy within last 5 years
Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00236639

Sponsors and Collaborators
Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
Study Director: Johnson & Johnson Pharmaceutical Research & Development, L.L. C. Clinical Trial Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
More Information

ClinicalTrials.gov Identifier: NCT00236639     History of Changes
Other Study ID Numbers: CR003721
First Posted: October 12, 2005    Key Record Dates
Last Update Posted: April 28, 2010
Last Verified: April 2010

Keywords provided by Johnson & Johnson Pharmaceutical Research & Development, L.L.C.:
Type 2 Diabetes Mellitus
Body Mass Index

Additional relevant MeSH terms:
Nutrition Disorders
Body Weight
Signs and Symptoms
Neuroprotective Agents
Protective Agents
Physiological Effects of Drugs
Anti-Obesity Agents