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)
Who can join
Ages 18 and older · All sexes
Full eligibility criteria
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).
About the study
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.
What is being tested
- PF-08653944 (drug)
- Placebo (other)
Sponsor: Pfizer · Participants: 954 · Started: Jun 10, 2026
Contact the study team
- Pfizer CT.gov Call Center · Phone: 1-800-718-1021
Official record on ClinicalTrials.gov — NCT07595549
Locations in the U.S.
Conditions
- Obesity
- Overweight
- Type 2 Diabetes
- Diabetes
- Endocrine Diseases
- Signs and Symptoms
- Signs and Symptoms Pathological Conditions
- Metabolic Disorders
From ClinicalTrials.gov, data retrieved Oct 1, 2026. Each study sets its own eligibility; the study team decides who can join.