New Weight-Loss drug retatrutide shows promise in phase 3 trial
NCT ID NCT07357415
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This phase 3 trial is testing different ways to increase the dose of retatrutide, a new weight-loss drug, in 600 people with obesity or overweight who do not have type 2 diabetes. The study lasts about 113 weeks and measures weight loss, waist size, and other health markers. The goal is to find the safest and most effective dosing schedule.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Retatrutide (a drug injected under the skin)
- What this could lead to
- If successful, this could lead to a more effective weight-loss treatment for people with obesity or overweight, potentially reducing related health risks like high blood pressure and heart disease.
- What could go wrong
- This is an early-stage phase 3 trial, so results are not yet confirmed. The drug may cause side effects, and weight loss may vary. It is not a cure for obesity, and long-term effects are unknown.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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About 600 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2026
- Expected to finish
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Nov 2028
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Have a Body Mass Index (BMI) at screening * ≥ 30 kilogram per square meter (kg/m2) OR * ≥ 27 kg/m2 with presence of at least one of the following weight-related conditions at screening: high blood pressure, abnormal levels of lipid, obstructive sleep apnea, heart disease * Have at least one unsuccessful attempt to lose weight by dieting Exclusion Criteria: * Have a self-reported change in body weight \>5 kilograms (kg) (11 pounds) within 90 days before screening * Have a prior or planned surgical treatment for obesity * Have type 1 diabetes or type 2 diabetes * Have a family or personal history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN-2) * Have had within the past 90 days before screening: * heart attack * stroke * hospitalization for unstable angina or heart failure * Have New York Heart Association Functional Classification Class IV congestive heart failure * Have a history of chronic or acute pancreatitis * Have taken weight loss drugs, including over-the counter medications within 90 days prior to screening
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Advanced Research Institute
Ogden, Utah, 84405, United States
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Aggarwal and Associates Limited
Brampton, L6T 0G1, Canada
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Arizona Research Center
Phoenix, Arizona, 85053, United States
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Brigham and Women's Hospital Diabetes Program
Boston, Massachusetts, 02115, United States
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C.I.C. Mauricie inc.
Trois-Rivières, G8T 7A1, Canada
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CAMC Institute for Academic Medicine
Charleston, West Virginia, 25304, United States
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CARDIAMET Investigaciones Médicas
Buenos Aires, C1014ACP, Argentina
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Canadian Phase Onward
Toronto, M3J 0K2, Canada
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Care Access - Huntington Beach
Huntington Beach, California, 92648, United States
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Care Access - Raleigh
Raleigh, North Carolina, 27607, United States
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Cedar Health Research
Dallas, Texas, 75251, United States
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Cedar Health Research - Fort Worth
Fort Worth, Texas, 76132, United States
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Cedar Health Research - Texas Native Health
Dallas, Texas, 75235, United States
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Centro Médico Viamonte
Buenos Aires, C1120AAC, Argentina
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Centro de Investigaciones Metabólicas (CINME)
Buenos Aires, C1056ABI, Argentina
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Cicemo Srl
Buenos Aires, 1424, Argentina
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Diex Recherche Inc. Division Joliette
Joliette, J6E 6A9, Canada
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Diex Recherche Inc. Division Quebec
Québec, G1V 4T3, Canada
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Diex Recherche Inc. Division Sherbrooke
Sherbrooke, J1L 0H8, Canada
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Dominion Medical Associates, Inc.
Richmond, Virginia, 23219, United States
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Dr. Anil K. Gupta Medicine Professional Corporation
Toronto, M9V 4B4, Canada
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Encore Medical Research - Weston
Weston, Florida, 33331, United States
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Great Lakes Research Group, Inc.
Bay City, Michigan, 48706, United States
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Los Angeles Institute for Metabolic Research
Los Angeles, California, 90015, United States
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Med Trust Research
Courtice, L1E 2J5, Canada
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Milestone Research Inc.
London, N5W 6A2, Canada
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Monroe Biomedical Research - Louisville
Louisville, Kentucky, 40213, United States
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NYC Research INC
Long Island City, New York, 11106, United States
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New Horizon Research Center
Miami, Florida, 33165, United States
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New Phase Research and Development
Knoxville, Tennessee, 37909, United States
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Pacific Diabetes & Endocrine Center
Honolulu, Hawaii, 96817, United States
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Stat Research S.A.
Buenos Aires, C1023AAB, Argentina
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Velocity Clinical Research, Dallas
Dallas, Texas, 75230, United States
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Weill Cornell Medical College
New York, New York, 10021, United States
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Winterberry Research Inc.
Hamilton, L8J 0B6, Canada
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