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A VI-0521 Study to Evaluate the Long-term Safety and Efficacy in Type 2 Diabetic Adults

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: NCT00600067
Recruitment Status : Completed
First Posted : January 24, 2008
Results First Posted : September 3, 2012
Last Update Posted : September 10, 2012
Sponsor:
Collaborators:
Synteract, Inc.
Sentrx
Information provided by (Responsible Party):
VIVUS LLC

Study Type Interventional
Study Design Allocation: Randomized;   Intervention Model: Parallel Assignment;   Masking: Triple (Participant, Investigator, Outcomes Assessor);   Primary Purpose: Treatment
Condition Diabetes
Interventions Drug: Phentermine/Topiramate
Drug: Placebo
Enrollment 130
Recruitment Details Subject recruitment occurred in 10 investigative sites in the U.S. between January 2008 and October 2008
Pre-assignment Details  
Arm/Group Title Placebo VI-0521
Hide Arm/Group Description [Not Specified] phentermine 15 mg/topiramate 92 mg
Period Title: Overall Study
Started 55 75
Completed 52 68
Not Completed 3 7
Reason Not Completed
Adverse Event             0             1
Lost to Follow-up             2             3
protocol non-compliance             0             3
Lack of Efficacy             1             0
Arm/Group Title Placebo Active Total
Hide Arm/Group Description [Not Specified] PHEN/TPM 15/92 Total of all reporting groups
Overall Number of Baseline Participants 55 75 130
Hide Baseline Analysis Population Description
[Not Specified]
Age Continuous  
Mean (Standard Deviation)
Unit of measure:  Years
Number Analyzed 55 participants 75 participants 130 participants
49.5  (8.58) 49.7  (7.51) 49.6  (7.95)
Sex: Female, Male  
Measure Type: Count of Participants
Unit of measure:  Participants
Number Analyzed 55 participants 75 participants 130 participants
Female
32
  58.2%
58
  77.3%
90
  69.2%
Male
23
  41.8%
17
  22.7%
40
  30.8%
Region of Enrollment  
Measure Type: Number
Unit of measure:  Participants
United States Number Analyzed 55 participants 75 participants 130 participants
55 75 130
1.Primary Outcome
Title HbA1c Change From Baseline Week 0 to Week 56
Hide Description [Not Specified]
Time Frame Baseline to 56 weeks
Hide Outcome Measure Data
Hide Analysis Population Description
Intent-to-treat Last-observation-carried-forward (ITT-LOCF)
Arm/Group Title Placebo VI-0521
Hide Arm/Group Description:
[Not Specified]
phentermine 15mg/topiramate 92 mg
Overall Number of Participants Analyzed 55 75
Least Squares Mean (Standard Error)
Unit of Measure: percent change
-1.2  (0.13) -1.56  (0.11)
Hide Statistical Analysis 1
Statistical Analysis Overview Comparison Group Selection Placebo, VI-0521
Comments [Not Specified]
Type of Statistical Test Superiority or Other
Comments [Not Specified]
Statistical Test of Hypothesis P-Value 0.0381
Comments [Not Specified]
Method ANCOVA
Comments [Not Specified]
Method of Estimation Estimation Parameter Mean Difference (Final Values)
Estimated Value -0.36
Confidence Interval (2-Sided) 95%
-0.69 to -0.02
Parameter Dispersion
Type: Standard Error of the mean
Value: 0.17
Estimation Comments [Not Specified]
2.Secondary Outcome
Title Percent Weight Loss From Baseline to Week 56
Hide Description [Not Specified]
Time Frame Baseline to 56 weeks
Hide Outcome Measure Data
Hide Analysis Population Description
Intent-to-treat Last-observation-carried-forward (ITT-LOCF)
Arm/Group Title Placebo VI-0521
Hide Arm/Group Description:
[Not Specified]
phentermine 15mg/topiramate 92mg
Overall Number of Participants Analyzed 55 75
Least Squares Mean (Standard Error)
Unit of Measure: percent change
-2.71  (0.95) -9.41  (0.81)
Hide Statistical Analysis 1
Statistical Analysis Overview Comparison Group Selection Placebo, VI-0521
Comments [Not Specified]
Type of Statistical Test Superiority or Other
Comments [Not Specified]
Statistical Test of Hypothesis P-Value <0.0001
Comments [Not Specified]
Method ANCOVA
Comments [Not Specified]
Method of Estimation Estimation Parameter Mean Difference (Final Values)
Estimated Value -6.70
Confidence Interval (2-Sided) 95%
-9.18 to -4.21
Parameter Dispersion
Type: Standard Error of the mean
Value: 1.26
Estimation Comments [Not Specified]
Time Frame AEs were collected from when written informed consent was provided through 28 days after the last dose of investigational product.
Adverse Event Reporting Description [Not Specified]
 
Arm/Group Title Placebo Active
Hide Arm/Group Description [Not Specified] PHEN/TPM 15/92
All-Cause Mortality
Placebo Active
Affected / at Risk (%) Affected / at Risk (%)
Total   --/--   --/-- 
Hide Serious Adverse Events
Placebo Active
Affected / at Risk (%) Affected / at Risk (%)
Total   1/55 (1.82%)   2/75 (2.67%) 
Hepatobiliary disorders     
cholelithiasis  1  1/55 (1.82%)  0/75 (0.00%) 
Musculoskeletal and connective tissue disorders     
costochondritis  1  0/55 (0.00%)  1/75 (1.33%) 
intervertebral disc protrusion  1  0/55 (0.00%)  1/75 (1.33%) 
Indicates events were collected by systematic assessment
1
Term from vocabulary, MedDRA (10.0)
Hide Other (Not Including Serious) Adverse Events
Frequency Threshold for Reporting Other Adverse Events 1%
Placebo Active
Affected / at Risk (%) Affected / at Risk (%)
Total   34/55 (61.82%)   48/75 (64.00%) 
Eye disorders     
vision blurred  1  2/55 (3.64%)  0/75 (0.00%) 
Gastrointestinal disorders     
constipation  1  1/55 (1.82%)  4/75 (5.33%) 
diarrhea  1  2/55 (3.64%)  0/75 (0.00%) 
nausea  1  1/55 (1.82%)  1/75 (1.33%) 
vomiting  1  0/55 (0.00%)  1/75 (1.33%) 
abdominal pain  1  1/55 (1.82%)  1/75 (1.33%) 
General disorders     
pyrexia  1  2/55 (3.64%)  0/75 (0.00%) 
Infections and infestations     
upper respiratory tract infection  1  8/55 (14.55%)  7/75 (9.33%) 
Influenza  1  0/55 (0.00%)  2/75 (2.67%) 
nasopharyngitis  1  1/55 (1.82%)  1/75 (1.33%) 
bronchitis  1  0/55 (0.00%)  1/75 (1.33%) 
urinary tract infection  1  1/55 (1.82%)  1/75 (1.33%) 
sinusitis  1  1/55 (1.82%)  0/75 (0.00%) 
Metabolism and nutrition disorders     
hypoglycemia  1  5/55 (9.09%)  9/75 (12.00%) 
diabetes mellitus  1  5/55 (9.09%)  1/75 (1.33%) 
hypokalemia  1  0/55 (0.00%)  2/75 (2.67%) 
Musculoskeletal and connective tissue disorders     
back pain  1  3/55 (5.45%)  3/75 (4.00%) 
pain in extremity  1  2/55 (3.64%)  1/75 (1.33%) 
arthralgia  1  1/55 (1.82%)  1/75 (1.33%) 
Nervous system disorders     
paresthesia  1  0/55 (0.00%)  4/75 (5.33%) 
dizziness  1  1/55 (1.82%)  1/75 (1.33%) 
headache  1  1/55 (1.82%)  1/75 (1.33%) 
hypoesthesia  1  1/55 (1.82%)  2/75 (2.67%) 
Psychiatric disorders     
insomnia  1  0/55 (0.00%)  1/75 (1.33%) 
anxiety  1  1/55 (1.82%)  0/75 (0.00%) 
depression  1  0/55 (0.00%)  1/75 (1.33%) 
Respiratory, thoracic and mediastinal disorders     
cough  1  3/55 (5.45%)  0/75 (0.00%) 
Vascular disorders     
hypertension  1  1/55 (1.82%)  3/75 (4.00%) 
Indicates events were collected by systematic assessment
1
Term from vocabulary, MedDRA (10.0)
Certain Agreements
Principal Investigators are NOT employed by the organization sponsoring the study.
There IS an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.
After Sponsor's written notification that publication of results is no longer planned or 12 months after termination of the study at all sites, Institution & PI may publish, upon written approval from Sponsor, results of the Study. Sponsor will be given the opportunity to review any proposed publication at least 60 days prior to submission for publication or disclosure. Upon Sponsor's written request, Institution and PI shall not publish or disclose information related to the Study.
Results Point of Contact
Layout table for Results Point of Contact information
Name/Title: Wesley W. Day, PhD
Organization: Vivus, Inc
Phone: 650-934-5200
EMail: day@vivus.com
Layout table for additonal information
Responsible Party: VIVUS LLC
ClinicalTrials.gov Identifier: NCT00600067    
Other Study ID Numbers: DM-230
First Submitted: January 11, 2008
First Posted: January 24, 2008
Results First Submitted: July 31, 2012
Results First Posted: September 3, 2012
Last Update Posted: September 10, 2012