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A Study Comparing Multiple Doses of VI-0521 With Placebo and Their Single-agent Constituents for Treatment of Obesity in Adults

This study has been completed.
Sponsor:
Collaborator:
Medpace, Inc.
Information provided by (Responsible Party):
VIVUS, Inc.
ClinicalTrials.gov Identifier:
NCT00563368
First received: November 21, 2007
Last updated: September 5, 2012
Last verified: September 2012
History of Changes
  Purpose

The objective of this study is to evaluate the safety and efficacy of various doses of VI-0521 compared to both placebo, and the single-agent components that comprise each combination dose. This study will provide confirmatory data to demonstrate that doses of VI-0521 have efficacy that is greater than placebo and each of the single-agent components that comprise the combination dose.


Condition Intervention Phase
Obesity
 Drug: VI-0521
Drug: topiramate
Drug: phentermine
 Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Phase III, Randomized, Double-Blind, Parallel-Design Study Comparing Multiple Doses of VI-0521 to Placebo and Their Single-Agent Phentermine and Topiramate Constituents for the Treatment of Obesity in Adults

Resource links provided by NLM:

MedlinePlus related topics: Obesity
U.S. FDA Resources

Further study details as provided by VIVUS, Inc.:

Primary Outcome Measures:
  • Percent Weight Loss From Baseline to Week 28 [ Time Frame: baseline to 28 weeks ] [ Designated as safety issue: No ]
    Percent weight loss from baseline to Week 28 with last observation carried forward (LOCF)

  • Percentage of Subjects With at Least 5% Weight Loss at Week 28 With LOCF [ Time Frame: baseline to 28 weeks ] [ Designated as safety issue: No ]

Enrollment: 756
Study Start Date: December 2007
Study Completion Date: September 2008
Primary Completion Date: September 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: VI-0521 Top
VI-0521; high dose phentermine/topiramate
 Drug: VI-0521
phentermine 15 mg and topiramate 92 mg, po once daily
Experimental: VI-0521 Mid
VI-0521; mid dose phentermine/topiramate
 Drug: VI-0521
phentermine 7.5 mg and topiramate 46 mg, po once daily
Active Comparator: TPM 46
mid dose topiramate
 Drug: topiramate
topiramate 46 mg, po once daily
Active Comparator: TPM 92
high dose topiramate
 Drug: topiramate
topiramate 92 mg, po once daily
Active Comparator: PHEN 7.5
mid dose phentermine
 Drug: phentermine
phentermine 7.5 mg, po once daily
Active Comparator: PHEN 15
high dose phentermine
 Drug: phentermine
phentermine 15 mg, po once daily
Placebo Comparator: Placebo Drug: VI-0521
placebo, po once daily

  Eligibility

Ages Eligible for Study:   18 Years to 70 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • 70 years of age or less with body mass index (BMI) between 30 and 45 kg/m2
  • Informed Consent
  • Females of child-bearing potential must be using adequate contraception

Exclusion Criteria:

  • Stroke/myocardial infarction (MI)/unstable cardiovascular disease within 6 months
  • Clinically significant renal, hepatic or psychiatric disease
  • Unstable thyroid disease or replacement therapy
  • Nephrolithiasis
  • Obesity of known genetic or endocrine origin
  • Participation in a formal weight loss program or lifestyle intervention
  • Glaucoma or elevated intraocular pressure
  • Pregnancy or breastfeeding
  • Drug or Alcohol abuse
  • Smoking cessation within previous 3 months or plans to quit smoking during study
  • Eating disorders within past year
  • Cholelithiasis within past 6 months
  • Type 2 diabetes
  • Previous bariatric surgery
  • Bipolar disorder or psychosis
  • Steroid hormone therapy not stable for 3 months
  • Systolic blood pressure > 160 mmHg, diastolic blood pressure > 100 mmHg
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00563368

Locations
United States, North Carolina
Research Site
Durham, North Carolina, United States
United States, Pennsylvania
Research Site
Philadelphia, Pennsylvania, United States
Sponsors and Collaborators
VIVUS, Inc.
Medpace, Inc.
Investigators
Study Director: Craig Peterson VIVUS, Inc.
Study Chair: Kishore Gadde, MD Duke University
  More Information

No publications provided

Responsible Party: VIVUS, Inc.
ClinicalTrials.gov Identifier: NCT00563368     History of Changes
Other Study ID Numbers: OB-301
Study First Received: November 21, 2007
Results First Received: July 31, 2012
Last Updated: September 5, 2012
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Obesity
Overnutrition
Nutrition Disorders
Overweight
Body Weight
Signs and Symptoms
Phentermine
Topiramate
Central Nervous System Stimulants
Physiological Effects of Drugs
Pharmacologic Actions
Central Nervous System Agents
 Therapeutic Uses
Appetite Depressants
Anti-Obesity Agents
Sympathomimetics
Autonomic Agents
Peripheral Nervous System Agents
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Anticonvulsants
Neuroprotective Agents
Protective Agents

ClinicalTrials.gov processed this record on May 23, 2013