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A Study to Learn About Study Medicine Called Berobenatide in Adults With Knee Pain and Overweight or Obesity (VESPER-OA 1)

RecruitingPhase 3

A PHASE 3, RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED STUDY TO ASSESS THE EFFICACY AND SAFETY OF ONCE-MONTHLY BEROBENATIDE IN ADULTS WITH KNEE OSTEOARTHRITIS AND OVERWEIGHT OR OBESITY (VESPER-OA 1)

Who can join

Ages 18 and older · All sexes

Full eligibility criteria
Inclusion Criteria:

* Adults 18 years of age or older, or the minimum age of consent according to local regulations.
* Body mass index of at least 27 kg/m² at Screening.
* Currently meets American College of Rheumatology (ACR) Criteria for knee OA.
* Pain due to knee OA.
* Knee radiograph consistent with knee osteoarthritis and Kellgren-Lawrence Grade 2 or 3.
* Willingness to complete the required analgesic washout.
* History of at least 1 self-reported unsuccessful dietary effort to lose body weight.

Exclusion Criteria

* Self-reported body weight increase or decrease greater than 5% within 90 days before Screening.
* History of diabetes or Screening laboratory findings indicative of diabetes.
* Known clinically significant gastric-emptying abnormality, history of acute or chronic pancreatitis, or active symptomatic gallbladder disease.
* Personal history or first-degree family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2.
* Significant active or unstable psychiatric disorder.
* Condition or knee disorder that could confound assessment of target-knee pain.
* Prior target-knee replacement, planned target-knee replacement, or planned elective knee surgery during the study.
* Recent use of weight-loss medication, any glucose-lowering therapy, or other protocol-prohibited treatment.
* Prior participation in a berobenatide clinical trial with receipt of active treatment or placebo.
* Hypersensitivity to a drug with glucagon-like peptide-1 receptor activity, including berobenatide, or any excipient.

About the study

The purpose of this clinical study is to learn about the safety and effects of berobenatide (PF-08653944) for the treatment of knee osteoarthritis in adults with overweight or obesity. The study will last 52 weeks and compare the effects of berobenatide compared to placebo on knee pain, physical function, and body weight. Study activities will include blood tests, knee pain assessment, physical function questionnaires and body measurements.

What is being tested

Sponsor: Pfizer · Participants: 656 · Started: Oct 26, 2026

Contact the study team

Official record on ClinicalTrials.gov — NCT07919678

Locations in the U.S.

ArizonaAMR Clinical, Tempe (Not yet recruiting)
CaliforniaHeadlands Research California, LLC, Escondido (Not yet recruiting)
Prospective Research Innovations Inc., Rancho Cucamonga (Not yet recruiting)
Solace Clinical Research, Tustin (Not yet recruiting)
ColoradoSkylight Health Research, Colorado Springs (Not yet recruiting)
FloridaClinical Research of West Florida, Inc., Clearwater (Not yet recruiting)
Universal Axon Clinical Research LLC, Doral
Westside Center for Clinical Research, Jacksonville (Not yet recruiting)
Renstar Medical Research, Lady Lake (Not yet recruiting)
Renstar Medical Research, Ocala (Not yet recruiting)
Clinical Research of West Florida, Inc., Tampa (Not yet recruiting)
GeorgiaClinical Research Atlanta, Stockbridge (Not yet recruiting)
North Georgia Clinical Research, LLC, Woodstock (Not yet recruiting)
North Georgia Internal Medicine, Woodstock (Not yet recruiting)
IllinoisGreat Lakes Clinical Trials, LLC dba Flourish Research, Chicago (Not yet recruiting)
Northwestern Medicine, Chicago (Not yet recruiting)
Northwestern Memorial Hospital, Diagnostic Testing Center (Phlebotomy/EKG), Chicago (Not yet recruiting)
Northwestern Memorial Hospital, Investigational Drug Service, Chicago (Not yet recruiting)
Northwestern University Feinberg School Of Medicine, Chicago (Not yet recruiting)
KansasElevate Clinical Research, Wichita (Not yet recruiting)
LouisianaBRCR Global Louisiana, Gretna (Not yet recruiting)
MichiganProfound Research LLC, Farmington Hills
Revive Research Institute, Inc., Sterling Heights
New MexicoAlbuquerque Clinical Trials, Inc., Albuquerque (Not yet recruiting)
North CarolinaNovant Health Granite Quarry Internal Medicine (knee x-ray), Granite Quarry (Not yet recruiting)
Monroe Biomedical Research, Monroe
Accellacare - Salisbury, Salisbury (Not yet recruiting)
Accellacare, Wilmington
Delaney Radiologist, Wilmington
OklahomaAMR Clinical, Norman (Not yet recruiting)
PennsylvaniaAltoona Center For Clinical Research, Duncansville
TexasMercy Family Clinic, Dallas (Not yet recruiting)
Cedar Health Research, Fort Worth (Not yet recruiting)
JCCT-JUNO NW Houston, Houston (Not yet recruiting)
Activian Clinical Research, Kingwood (Not yet recruiting)
Consano Clinical Research, LLC, Shavano Park (Not yet recruiting)
DM Clinical Research, Tomball (Not yet recruiting)
Velocity Clinical Research, Waco, Waco (Not yet recruiting)
VirginiaCharlottesville Medical Research Center, LLC, Charlottesville (Not yet recruiting)

Conditions

From ClinicalTrials.gov, data retrieved Nov 15, 2026. Each study sets its own eligibility; the study team decides who can join.