Completed

PF-06882961 for Adults with Obesity: Safety and Efficacy

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Study Aim

This phase 2 study aims to evaluate the safety and effectiveness of PF-06882961 in adults with obesity, specifically measuring the percent change in body weight from the start of the treatment to the end, at week 26 for cohorts 1 and 2, and week 32 for cohort 3.

What is being tested

Placebo (Cohorts 1 and 2)

+ PF-06882961 (Cohorts 1 and 2)

+ Placebo (Cohort 3)

Drug
Who is being recruted

Body Weight+7

+ Body Weight Changes

+ Nutrition Disorders

From 18 to 75 Years
+18 Eligibility Criteria
See all eligibility criteria
How is the trial designed

Treatment Study

Placebo-ControlledPhase 2
Interventional
Study Start: January 2021
See protocol details

Summary

Principal SponsorPfizer
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: January 29, 2021

Actual date on which the first participant was enrolled.

This clinical trial aims to understand the safety and effectiveness of a potential obesity treatment called PF-06882961. The study compares the experiences of participants who take the actual medicine with those who take a placebo, a look-alike substance with no active ingredients. The goal is to observe the body's response to the medicine, including changes in body weight, waist and hip measurements, and how well participants tolerate it. The study also measures the levels of the medicine in participants' blood. This study is designed for adults with obesity who do not have diabetes and have maintained a stable body weight without participating in a formal weight loss program in the 90 days before the study. Participants will take the study medicine or placebo as tablets, twice a day - once in the morning and once in the evening. The study has three groups of participants, known as cohorts. For those in Cohorts 1 and 2, participation will last about 9 months with 15 planned study visits, including 14 visits to the study clinic and 1 telephone call. For participants in Cohort 3, participation will last about 10 months with 21 planned study visits, including 12 visits to the study clinic and 9 telephone calls. The primary outcomes measured are the percent change from baseline in body weight at the end of treatment, which is at Week 26 for Cohorts 1 and 2, and at Week 32 for Cohort 3.

Official TitleA PHASE 2B, RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED, PARALLEL GROUP, DOSE-RANGING STUDY TO EVALUATE THE EFFICACY AND SAFETY OF PF-06882961 ADMINISTRATION IN ADULTS WITH OBESITY
NCT04707313
Principal SponsorPfizer
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

628 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.



Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 18 to 75 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Body WeightBody Weight ChangesNutrition DisordersNutritional and Metabolic DiseasesObesitySigns and SymptomsPathological Conditions, Signs and SymptomsWeight LossOvernutritionOverweight

Criteria

2 inclusion criteria required to participate
Participants with obesity, defined as a Body Mass Index greater than or equal to 30.0 kg/m2

Stable body weight, defined as <5 kg change (per participant report) for 90 days before visit 1

16 exclusion criteria prevent from participating
Any condition possibly affecting drug absorption

Current or prior diagnosis of Type 1 or Type 2 diabetes mellitus or secondary forms of diabetes

History of myocardial infarction, unstable angina, arterial revascularization, stroke, heart failure, or transient ischemic attack within 6 months prior to visit 1

Any malignancy not considered cured

Show More Criteria

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

13 intervention groups are designated in this study

15.385% chance of being blinded to the placebo group

Treatment Groups

Group I

Placebo

Group II

Experimental
The dose will be titrated with 1 week of dosing at each step to reach the target dose of 120 mg BID.

Group III

Experimental
The dose will be titrated with 2 weeks of dosing at each step to reach the target dose of 120 mg BID.

Group IV

Experimental
The dose will be titrated with 1 week of dosing at each step to reach the target dose of 160 mg BID.

Group 5

Experimental
The dose will be titrated with 2 weeks of dosing at each step to reach the target dose of 160 mg BID.

Group 6

Experimental
The dose will be titrated with 1 week of dosing at each step to reach the target dose of 200 mg BID.

Group 7

Experimental
The dose will be titrated with 2 weeks of dosing at each step to reach the target dose of 200 mg BID.

Group 8

Experimental
The dose will be titrated with 1 week of dosing at each step to reach the target dose of 40 mg BID.

Group 9

Experimental
The dose will be titrated with 1 week of dosing at each step to reach the target dose of 80 mg BID.

Group 10

Placebo

Group 11

Experimental
The dose will be titrated with 4 weeks of dosing at each step to reach the target dose of 140 mg BID.

Group 12

Experimental
The dose will be titrated with 4 weeks of dosing at each step to reach the target dose of 200 mg BID.

Group 13

Experimental
The dose will be titrated with 4 weeks of dosing at each step to reach the target dose of 80 mg BID.

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 41 locations

Suspended

Pinnacle Research Group, LLC

Anniston, United StatesOpen Pinnacle Research Group, LLC in Google Maps
Suspended

Anaheim Clinical Trials, LLC

Anaheim, United States
Suspended

Velocity Clinical Research - Westlake

Los Angeles, United States
Suspended

Alliance for Multispecialty Research, LLC

Coral Gables, United States
Completed41 Study Centers