Retatrutide vs Every Drug: Comparison Hub

    By Trimi Medical Team14 min read

    How does retatrutide stack up against every other weight loss option? This comparison hub provides side-by-side data for retatrutide versus every major medication and intervention, based on clinical trial results (Jastreboff et al., NEJM 2023) and published data for each comparator.

    Medical Disclaimer: This article is for informational purposes only. Retatrutide is an investigational drug not yet approved by the FDA. Cross-trial comparisons are inherently limited; direct head-to-head studies provide the strongest evidence. Consult your provider for personalized treatment recommendations.

    Master Comparison Table

    TreatmentMechanismAvg Weight LossAdministrationFDA Status
    RetatrutideGLP-1/GIP/Glucagon24.2%Weekly injectionPhase 3
    Tirzepatide (Zepbound)GLP-1/GIP22.5%Weekly injectionApproved
    Semaglutide (Wegovy)GLP-115-17%Weekly injectionApproved
    Liraglutide (Saxenda)GLP-15-8%Daily injectionApproved
    ContraveBupropion/naltrexone5-8%Oral dailyApproved
    PhentermineSympathomimetic5-7%Oral dailyApproved (short-term)
    MetforminAMPK activation2-5%Oral dailyApproved (off-label)
    Gastric sleeveSurgical restriction25-30%SurgeryEstablished
    Gastric bypassSurgical restriction + malabsorption30-35%SurgeryEstablished
    Diet + exercise aloneBehavioral3-7%LifestyleN/A

    Detailed Comparison Articles

    For in-depth analysis of each comparison, see our dedicated articles:

    Key Takeaways

    • Retatrutide produces the most weight loss of any medication studied to date
    • Only bariatric surgery produces comparable or greater weight loss
    • Unlike surgery, retatrutide is reversible and non-invasive
    • Older medications (phentermine, Contrave) produce significantly less weight loss
    • Retatrutide's GI side effect profile appears favorable compared to semaglutide
    • The best treatment depends on individual medical history, goals, insurance, and preferences

    GLP-1 Treatment Available Now

    While retatrutide is in Phase 3 trials, Trimi offers compounded semaglutide ($125/month) and compounded tirzepatide ($125/month), the two most effective FDA-approved GLP-1 medications. Learn how Trimi works.

    Frequently Asked Questions

    Is retatrutide the best weight loss drug?

    Based on Phase 2 data, retatrutide produces the most average weight loss of any medication. However, "best" depends on individual factors including tolerability, cost, availability, and specific health goals.

    Should I wait for retatrutide instead of starting semaglutide or tirzepatide?

    Waiting delays treatment of a condition that worsens over time. Starting semaglutide or tirzepatide now provides immediate benefits, and switching to retatrutide later is an option when it becomes available.

    Can retatrutide replace bariatric surgery?

    For many patients, yes. Retatrutide approaches surgical weight loss results without surgical risks. However, some patients with extreme obesity (BMI 50+) or specific anatomical concerns may still benefit from surgery.

    Which is safer: retatrutide or surgery?

    Retatrutide is non-invasive and reversible, while surgery carries operative risks including infection, blood clots, and anesthesia complications. However, surgery is a one-time event while retatrutide requires ongoing use.

    Sources & References

    1. Wilding JPH et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. NEJM 2021;384:989-1002.
    2. Jastreboff AM et al. Tirzepatide Once Weekly for the Treatment of Obesity. NEJM 2022;387:205-216.
    3. Lincoff AM et al. Semaglutide and Cardiovascular Outcomes in Obesity without Diabetes. NEJM 2023;389:2221-2232.
    4. FDA Prescribing Information for Wegovy (semaglutide) and Zepbound (tirzepatide).

    What does the published clinical evidence show for retatrutide?

    Peer-reviewed evidence: Retatrutide 12 mg produced a mean body weight reduction of approximately 24.2% at 48 weeks in adults with obesity in a Phase 2 trial — the highest published mean weight reduction for any GLP-1-class agent in obesity to date. (Source: Jastreboff et al. Phase 2 trial, NEJM 2023). Trimi is preparing for launch; compounded availability depends on FDA-cleared compounding pathways. Results vary by individual; eligibility is determined by a licensed clinician.

    Retatrutide 12 mg produced a mean body weight reduction of approximately 24.2% at 48 weeks in adults with obesity in a Phase 2 trial — the highest published mean weight reduction for any GLP-1-class agent in obesity to date. — Jastreboff et al. Phase 2 trial, NEJM 2023
    Retatrutide 12 mg reduced HbA1c by approximately 2.02 percentage points at 36 weeks in patients with type 2 diabetes, compared with 1.41 points on dulaglutide 1.5 mg. — Rosenstock et al. Phase 2 T2D trial, Lancet 2023

    Key Takeaways

    • Retatrutide 12 mg produced a mean body weight reduction of approximately 24.2% at 48 weeks in adults with obesity in a Phase 2 trial — the highest published mean weight reduction for any GLP-1-class agent in obesity to date. (Source: Jastreboff et al. Phase 2 trial, NEJM 2023)
    • Retatrutide 12 mg reduced HbA1c by approximately 2.02 percentage points at 36 weeks in patients with type 2 diabetes, compared with 1.41 points on dulaglutide 1.5 mg. (Source: Rosenstock et al. Phase 2 T2D trial, Lancet 2023)
    • Retatrutide is investigational and not FDA-approved as of publication. Trial findings reported here are from Phase 2 / Phase 3 studies in peer-reviewed sources cited below.
    • Eligibility requires evaluation by a licensed clinician: BMI ≥30, or BMI ≥27 with at least one weight-related comorbidity (type 2 diabetes, hypertension, dyslipidemia, obstructive sleep apnea, cardiovascular disease). Contraindications include personal or family history of medullary thyroid carcinoma, MEN 2 syndrome, pancreatitis, severe gastrointestinal disease, severe renal impairment, pregnancy, and breastfeeding.
    • Common GLP-1 receptor agonist adverse effects include nausea, vomiting, diarrhea, constipation, and gallbladder events. Dose titration over weeks improves tolerability. Severe gastrointestinal symptoms may cause dehydration and increase acute kidney injury risk.
    • This is general information based on the cited evidence, not medical advice. Treatment decisions require evaluation by a licensed clinician familiar with your individual medical history, BMI, and comorbidities.

    Medically Reviewed

    TMRT

    Trimi Medical Review Team

    Clinical review workflow for GLP-1 safety, dosing, and access content

    Team-based medical review process documented in Trimi's Medical Review Policy

    Last reviewed: May 18, 2026

    TCCT

    Written by Trimi Clinical Content Team

    Medical Writers & Healthcare Professionals

    Our clinical content team includes registered nurses, pharmacists, and medical writers who specialize in translating complex medical information into clear, actionable guidance for patients.

    Medically reviewed by Trimi Medical Review Team, Clinical review workflow for GLP-1 safety, dosing, and access content

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    Scientific References

    1. Jastreboff AM, Kaplan LM, Frías JP, et al. (2023). Triple-Hormone-Receptor Agonist Retatrutide for Obesity — A Phase 2 Trial. New England Journal of Medicine.Read StudyDOI: 10.1056/NEJMoa2301972
    2. Rosenstock J, Frias J, Jastreboff AM, et al. (2023). Retatrutide, a GIP, GLP-1 and glucagon receptor agonist, for people with type 2 diabetes: a randomised, double-blind, placebo and active-controlled, parallel-group, phase 2 trial. The Lancet.Read StudyDOI: 10.1016/S0140-6736(23)01053-X
    3. ClinicalTrials.gov (2024). A Study of Retatrutide (LY3437943) in Participants Who Have Obesity or Are Overweight (TRIUMPH-1) — NCT05929066. ClinicalTrials.gov.Read Study
    4. Garvey WT, Mechanick JI, Brett EM, et al. (2024). American Association of Clinical Endocrinology / American College of Endocrinology Comprehensive Clinical Practice Guidelines for Medical Care of Patients with Obesity. Endocrine Practice.Read StudyDOI: 10.4158/EP161365.GL
    5. American Heart Association (2021). Obesity and Cardiovascular Disease: A Scientific Statement From the American Heart Association. Circulation.Read StudyDOI: 10.1161/CIR.0000000000000973
    6. Apovian CM, Aronne LJ, Bessesen DH, et al. (2015). Pharmacological Management of Obesity: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism.Read StudyDOI: 10.1210/jc.2014-3415

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