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A Study to Learn About the Study Medicine Called Berobenatide (PF-08653944) in People With Overweight or Obesity

A PHASE 3, RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED STUDY TO ASSESS THE EFFICACY AND SAFETY OF ONCE-MONTHLY PF-08653944 IN ADULTS WITH OVERWEIGHT OR OBESITY (VESPER-6)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07595549
Enrollment
954
Registered
2026-05-19
Start date
2026-06-10
Completion date
2028-06-21
Last updated
2026-09-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Obesity, Overweight, Overweight and/or Obesity

Keywords

Overnutrition, Nutrition Disorders, Diabetes Mellitus, Type 2, Type 2 Diabetes, Body Weight, Diabetes Mellitus, Glucose Metabolism Disorders, Endocrine System Diseases, Overweight, Obesity, Nutritional and Metabolic Diseases, Signs and Symptoms, Pathological Conditions, Signs and Symptoms, Metabolic Diseases

Brief summary

The purpose of this clinical study is to learn about the effects and safety of berobenatide (PF-08653944). This may help people with overweight or obesity lose weight. People in this study may also have type 2 diabetes. About 950 adults will be in this study. Berobenatide will be compared to a placebo. A placebo does not have any medicine in it but looks just like the medicine being studied. Berobenatide or placebo is given by a shot under the skin in the belly area. The objective of the study is to compare the experiences of people receiving berobenatide to those of the people who do not to assess if the study medicine is effective and safe. People will take part in this study for about 20 months. During this time, they will have about 15 study visits at the site. They will also have 2 study visits over the phone.

Interventions

By Subcutaneous Injection

OTHERPlacebo

By Subcutaneous Injection

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Aged ≥18 years. * BMI of: ≥30 kg/m2 or ≥27.0 kg/m2 to \<30.0 kg/m2 and must have at least 1 of the following weight-related co-morbidities: hypertension, dyslipidemia, obstructive sleep apnea, cardiovascular disease, or T2D.

Exclusion criteria

* Have a self-reported body weight change greater than 5% within 90 days prior to Screening. * Diagnosis of type 1 diabetes or any other form of diabetes other than T2D. * History of acute or chronic pancreatitis. * Personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia type 2 (MEN-2).

Design outcomes

Primary

MeasureTime frame
Percent change from baseline in body weightBaseline, Week 72

Secondary

MeasureTime frame
Number of Participants with Adverse Events of Special Interest (AESIs)Baseline, Week 72
Change from baseline in Fasting triglyceridesBaseline, Week 72
Change from baseline in high-sensitivity C-reactive proteinBaseline, Week 72
Change from baseline in interleukin-6Baseline, Week 72
Change from baseline in interleukin-1 betaBaseline, Week 72
Change from baseline in IWQoL-Lite-CT total scoreBaseline, Week 72
Change from baseline in IWQoL-Lite-CT Physical composite scoreBaseline, Week 72
Change from baseline in IWQoL-Lite-CT Psychosocial composite scoreBaseline, Week 72
Change from baseline in Short Form 36 health survey (SF-36) domain scales and component summary scalesBaseline, Week 72
Change from Baseline in Control of Eating Questionnaire (CoEQ) subscalesBaseline, Week 72
Change from Baseline in Food Noise Questionnaire (FNQ) total scoreBaseline, Week 72
Number of Participants With Treatment Emergent Adverse Events (TEAEs)Baseline, Week 72
Number of Participants with Serious adverse events (SAEs)Baseline, Week 72
Change from Baseline in revised Homeostatic Model Assessment beta-cell function as a percentage of a normal reference population (HOMA2-%B)Baseline, Week 72
Change from Baseline in HbA1cBaseline, Week 72
Change from baseline in Fasting Total CholesterolBaseline, Week 72
Change from baseline in Fasting Low-density lipoprotein cholesterolBaseline, Week 72
Change from baseline in Fasting Very low-density lipoprotein cholesterolBaseline, Week 72
Change from baseline in Fasting Non-High-density lipoprotein cholesterolBaseline, Week 72
Change from baseline in Fasting High-density lipoprotein cholesterolBaseline, Week 72
Change from baseline in body weightBaseline, Week 72
Change from baseline in waist circumferenceBaseline, Week 72
Percentage of Participants achieving ≥5% of body weight reduction from baselineBaseline, Week 72
Percentage of Participants achieving ≥10% of body weight reduction from baselineBaseline, Week 72
Percentage of Participants achieving ≥15% of body weight reduction from baselineBaseline, Week 72
Percentage of Participants achieving ≥20% of body weight reduction from baselineBaseline, Week 72
Percentage of Participants with a waist-to-height ratio of <0.53Baseline, Week 72
Percent change from baseline in body weight in participants with type 2 diabetesBaseline, Week 72
Change from baseline in Systolic Blood Pressure (SBP)Baseline, Week 72
Change from baseline in Impact of Weight on Quality of Life-Lite-Clinical Trial (IWQoL-Lite-CT) Physical Function composite scoreBaseline, Week 72
Percentage of Participants achieving ≥25% of body weight reduction from baselineBaseline, Week 72
Change from baseline in Diastolic Blood Pressure (DBP)Baseline, Week 72
Change from Baseline in Fasting GlucoseBasline, Week 72
Change from Baseline in Fasting insulinBaseline, Week 72
Number of Participants with adverse avents leading to discontinuationBaseline, Week 72
Change from Baseline in revised Homeostatic Model Assessment insulin sensitivity as a percentage of normal (HOMA2-%S)Baseline, Week 72

Countries

Brazil, Canada, Japan, South Korea, United States

Contacts

CONTACTPfizer CT.gov Call Center
ClinicalTrials.gov_Inquiries@pfizer.com1-800-718-1021
STUDY_DIRECTORPfizer CT.gov Call Center

Pfizer

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 5, 2026