Skip to content

Study · Randomized controlled trial · n = 442 · 2026

3 results

Weight Changes With Tirzepatide and Concomitant Weight-Inducing Medications: Post Hoc Analysis of Randomized Clinical Trials.

Galindo RJ, Gudzune KA, Look M, Lee CJ, Benabbad I, Cao D, Meng Q, Mojdami D

JAMA network open2 Mar 2026

Summary

The text of this summary is not shown here, because the article license does not allow reuse. Read it at the source (opens in a new tab)

Text rights: CC BY-NC-ND. Results still quote short attributed sentences.

Results from this study3

3 results from studies that gave the peptide. 3 results from people.

  1. 01HumanRandomized controlled trialEfficacy outcome

    In adults with overweight or obesity who used weight-inducing medications in SURMOUNT-1, tirzepatide changed weight by -13.3% (5 mg) to -21.3% (15 mg) versus placebo at 72 weeks.

    In plain wordsIn adults with obesity who also took weight-raising drugs, tirzepatide lowered weight more than placebo over 72 weeks, by 13.3% to 21.3%.

    Outcome
    DecreaseWeight change at week 72 in SURMOUNT-1 with weight-inducing medications
    Study

    n = 442

    Comparator
    Placebo
    Outcome group
    Body weight · Metabolic and weight
    Studied dose
    5 mg to 15 mg · 72 weeksAs given in this study (human).

    Measurements

    weight change vs placebo
    −13.3%
    tirzepatide 5 mg, SURMOUNT-1
    weight change vs placebo
    −21.3%
    tirzepatide 15 mg, SURMOUNT-1

    Source sentences

    Summary
    The mean percentage weight change compared with placebo from randomization to 72 weeks for those treated with tirzepatide and using WI medication was -13.3% (95% CI, -16.0% to -10.7%) for 5 mg to -21.3% (95% CI, -23.9% to -18.7%) for 15 mg in SURMOUNT-1
    1 context sentence
    Summary · context
    This post hoc analysis of the phase 3 randomized clinical trials SURMOUNT-1 (December 4, 2019, to April 1, 2022), SURMOUNT-3 (March 29, 2021, to May 12, 2023), and SURMOUNT-4 (March 29, 2021, to May 18, 2023) assessed the association between tirzepatide and weight reduction among participants taking…
  2. 02HumanRandomized controlled trialEfficacy outcome

    In adults with overweight or obesity who used weight-inducing medications in SURMOUNT-4, tirzepatide at the maximum tolerated dose changed weight by -18.6% versus placebo at 88 weeks.

    In plain wordsIn adults with obesity who also took weight-raising drugs, tirzepatide lowered weight by 18.6% compared with placebo over 88 weeks.

    Outcome
    DecreaseWeight change at week 88 in SURMOUNT-4 with weight-inducing medications
    Study

    n = 134

    Comparator
    Placebo
    Outcome group
    Body weight · Metabolic and weight
    Studied dose
    maximum tolerated dose · 88 weeksAs given in this study (human).

    Measurements

    weight change vs placebo
    −18.6%
    tirzepatide MTD, SURMOUNT-4

    Source sentences

    Summary
    from randomization to 88 weeks, it was -18.6% (95% CI, -20.9% to -16.3%) for the maximum tolerated dose in SURMOUNT-4
    1 context sentence
    Summary · context
    This post hoc analysis of the phase 3 randomized clinical trials SURMOUNT-1 (December 4, 2019, to April 1, 2022), SURMOUNT-3 (March 29, 2021, to May 12, 2023), and SURMOUNT-4 (March 29, 2021, to May 18, 2023) assessed the association between tirzepatide and weight reduction among participants taking…
  3. 03HumanRandomized controlled trialEfficacy outcome

    In adults with overweight or obesity who used weight-inducing medications in SURMOUNT-3, tirzepatide at the maximum tolerated dose changed weight by -26.1% versus placebo at 72 weeks.

    In plain wordsIn adults with obesity who also took weight-raising drugs, tirzepatide lowered weight by 26.1% compared with placebo over 72 weeks.

    Outcome
    DecreaseWeight change at week 72 in SURMOUNT-3 with weight-inducing medications
    Study

    n = 100

    Comparator
    Placebo
    Outcome group
    Body weight · Metabolic and weight
    Studied dose
    maximum tolerated dose · 72 weeksAs given in this study (human).

    Measurements

    weight change vs placebo
    −26.1%
    tirzepatide MTD, SURMOUNT-3

    Source sentences

    Summary
    -26.1% (95% CI, -30.0% to -22.3%) for the maximum tolerated dose in SURMOUNT-3
    1 context sentence
    Summary · context
    This post hoc analysis of the phase 3 randomized clinical trials SURMOUNT-1 (December 4, 2019, to April 1, 2022), SURMOUNT-3 (March 29, 2021, to May 12, 2023), and SURMOUNT-4 (March 29, 2021, to May 18, 2023) assessed the association between tirzepatide and weight reduction among participants taking…

AI wrote and checked these results. AI can make mistakes, so check important results against the source.

Registered trials3

Trials this study reports on, or that list this study as a reference. Registry data from ClinicalTrials.gov.

3 trials · 3 completed · 3 with posted results · source ClinicalTrials.gov (opens in a new tab)

CompletedPhase 3Results postedNCT04657016

A Study of Tirzepatide (LY3298176) In Participants After A Lifestyle Weight Loss Program

Eli Lilly and Companyn = 57929 Mar 2021 to 12 May 2023

Obesity · Overweight

Trial pageClinicalTrials.govUpdated 16 May 2024
CompletedPhase 3Results postedNCT04660643

A Study of Tirzepatide (LY3298176) in Participants With Obesity or Overweight for the Maintenance of Weight Loss

Eli Lilly and Companyn = 78329 Mar 2021 to 18 May 2023

Obesity · Overweight

Trial pageClinicalTrials.govUpdated 22 May 2024
CompletedPhase 3Results postedNCT04184622

A Study of Tirzepatide (LY3298176) in Participants With Obesity or Overweight

Eli Lilly and Companyn = 2,5394 Dec 2019 to 6 Jul 2024

Overweight · Obesity

Trial pageClinicalTrials.govUpdated 24 Jul 2025

Version history

PepBank keeps every version of the data on this study. Status changes from Retraction Watch, Europe PMC and Crossref are listed with their source.

  1. Version 2Current

    12 Oct 2026, 12:10 UTC

    Study results updated

  2. Version 1

    9 Oct 2026, 03:07 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

PepBank is a research reference. Talk to a doctor before you use any peptide.