A Study of Tirzepatide (LY3298176) in Participants With Obesity or Overweight (SURMOUNT-1)
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ClinicalTrials.gov Identifier: NCT04184622 |
Recruitment Status :
Active, not recruiting
First Posted : December 3, 2019
Last Update Posted : April 13, 2022
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
Overweight Obesity | Drug: Tirzepatide Drug: Placebo | Phase 3 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 2539 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Double (Participant, Investigator) |
Primary Purpose: | Treatment |
Official Title: | Efficacy and Safety of Tirzepatide Once Weekly in Participants Without Type 2 Diabetes Who Have Obesity or Are Overweight With Weight- Related Comorbidities: A Randomized, Double-Blind, Placebo-Controlled Trial (SURMOUNT-1) |
Actual Study Start Date : | December 4, 2019 |
Actual Primary Completion Date : | April 1, 2022 |
Estimated Study Completion Date : | May 24, 2024 |

Arm | Intervention/treatment |
---|---|
Experimental: 5 mg Tirzepatide
5 milligrams (mg) tirzepatide administered subcutaneously (SC) once a week.
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Drug: Tirzepatide
Administered SC
Other Name: LY3298176 |
Experimental: 10 mg Tirzepatide
10 mg tirzepatide administered SC once a week.
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Drug: Tirzepatide
Administered SC
Other Name: LY3298176 |
Experimental: 15 mg Tirzepatide
15 mg tirzepatide administered SC once a week.
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Drug: Tirzepatide
Administered SC
Other Name: LY3298176 |
Placebo Comparator: Placebo
Placebo administered SC once a week.
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Drug: Placebo
Administered SC |
- Percent Change from Baseline in Body Weight [ Time Frame: Baseline, Week 72 ]Percent Change from Baseline in Body Weight
- Percentage of Participants who Achieve ≥5% Body Weight Reduction [ Time Frame: Week 72 ]Percentage of Participants who Achieve ≥5% Body Weight Reduction
- Change from Baseline in Body Weight [ Time Frame: Baseline, Week 20 ]Change from Baseline in Body Weight
- Percent Change from Baseline in Body Weight [ Time Frame: Baseline, Week 176 ]Percent Change from Baseline in Body Weight
- Percentage of Participants who Achieve ≥10% Body Weight Reduction [ Time Frame: Week 72 ]Percentage of Participants who Achieve ≥10% Body Weight Reduction
- Percentage of Participants who Achieve ≥15% Body Weight Reduction [ Time Frame: Week 72 ]Percentage of Participants who Achieve ≥15% Body Weight Reduction
- Percentage of Participants who Achieve ≥5% Body Weight Reduction [ Time Frame: Week 176 ]Percentage of Participants who Achieve ≥5% Body Weight Reduction
- Percentage of Participants who Achieve ≥20% Body Weight Reduction [ Time Frame: Week 72 ]Percentage of Participants who Achieve ≥20% Body Weight Reduction
- Change from Baseline in Waist Circumference [ Time Frame: Baseline, Week 72 ]Change from Baseline in Waist Circumference
- Change from Baseline in Body Mass Index (BMI) [ Time Frame: Baseline, Week 72 ]Change from Baseline in BMI
- Change from Baseline in Fasting Glucose [ Time Frame: Baseline, Week 72 ]Change from Baseline in Fasting Glucose
- Change from Baseline in Fasting Insulin [ Time Frame: Baseline, Week 72 ]Change from Baseline in Fasting Insulin
- Time to Onset of Type 2 Diabetes [ Time Frame: Baseline through Week 176 ]Time to Onset of Type 2 Diabetes
- Change from Baseline in Hemoglobin A1c (HbA1c) [ Time Frame: Baseline, Week 72 ]Change from Baseline in HbA1c
- Change from Baseline in Triglycerides [ Time Frame: Baseline, Week 72 ]Change from Baseline in Triglycerides
- Change from Baseline in Low-Density Lipoprotein (LDL) Cholesterol [ Time Frame: Baseline, Week 72 ]Change from Baseline in LDL Cholesterol
- Change from Baseline in Total Cholesterol [ Time Frame: Baseline, Week 72 ]Change from Baseline in Total Cholesterol
- Change from Baseline in High-Density Lipoprotein (HDL) Cholesterol [ Time Frame: Baseline, Week 72 ]Change from Baseline in HDL Cholesterol
- Change from Baseline in Very Low-Density Lipoprotein (VLDL) Cholesterol [ Time Frame: Baseline, Week 72 ]Change from Baseline in VLDL Cholesterol
- Change from Baseline in Free Fatty Acids [ Time Frame: Baseline, Week 72 ]Change from Baseline in Free Fatty Acids
- Change from Baseline in Systolic Blood Pressure [ Time Frame: Baseline, Week 72 ]Change from Baseline in Systolic Blood Pressure
- Change from Baseline in Diastolic Blood Pressure [ Time Frame: Baseline, Week 72 ]Change from Baseline in Diastolic Blood Pressure
- Change from Baseline in Short Form Survey-36 Version 2 (SF-36v2) Acute Form Physical Functioning Domain Score [ Time Frame: Baseline, Week 72 ]Change from Baseline in SF-36v2 Acute Form Physical Functioning Domain Score
- Change from Baseline in Impact of Weight on Quality of Life-Lite-Clinical Trials Version (IWQOL-Lite-CT) Physical Function Composite Score [ Time Frame: Baseline, Week 72 ]Change from Baseline in IWQOL-Lite-CT Physical Function Composite Score
- Pharmacokinetics (PK): Steady State Area Under the Concentration Time Curve (AUC) of Tirzepatide [ Time Frame: Baseline through Week 72 ]PK: Steady State AUC of Tirzepatide

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Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Body mass Index (BMI) ≥30 kilograms per square meter (kg/m²), or ≥27 kg/m² and previous diagnosis with at least one of the following comorbidities: hypertension, dyslipidemia, obstructive sleep apnea, cardiovascular disease
- History of at least one unsuccessful dietary effort to lose body weight
Exclusion Criteria:
- Diabetes mellitus
- Change in body weight greater than 5 kg within 3 months prior to starting study
- Obesity induced by other endocrinologic disorders or monogenetic or syndromic forms of obesity
- History of pancreatitis
- Family or personal history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN-2)
- History of significant active or unstable major depressive disorder (MDD) or other severe psychiatric disorder within the last 2 years
- Any lifetime history of a suicide attempt

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04184622

Study Director: | Call 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559 Mon - Fri 9 AM - 5 PM Eastern time (UTC/GMT - 5 hours, EST) | Eli Lilly and Company |
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: | Eli Lilly and Company |
ClinicalTrials.gov Identifier: | NCT04184622 |
Other Study ID Numbers: |
17244 I8F-MC-GPHK ( Other Identifier: Eli Lilly and Company ) |
First Posted: | December 3, 2019 Key Record Dates |
Last Update Posted: | April 13, 2022 |
Last Verified: | April 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Yes |
Plan Description: | Anonymized individual patient level data will be provided in a secure access environment upon approval of a research proposal and a signed data sharing agreement. |
Supporting Materials: |
Study Protocol Statistical Analysis Plan (SAP) Clinical Study Report (CSR) |
Time Frame: | Data are available 6 months after the primary publication and approval of the indication studied in the US and EU, whichever is later. Data will be indefinitely available for requesting. |
Access Criteria: | A research proposal must be approved by an independent review panel and researchers must sign a data sharing agreement. |
URL: | http://vivli.org/ |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Metabolism and Nutrition Disorder Prediabetes |
Obesity Overweight Overnutrition Nutrition Disorders Body Weight Tirzepatide |
Hypoglycemic Agents Physiological Effects of Drugs Incretins Hormones Hormones, Hormone Substitutes, and Hormone Antagonists |