Type 2 DiabetesPhase 3SURPASS-6NCT04537923
A Study of Tirzepatide (LY3298176) Versus Insulin Lispro (U100) in Participants With Type 2 Diabetes Inadequately Controlled on Insulin Glargine (U100) With or Without Metformin
A Phase 3 study testing Tirzepatide and Insulin Lispro (U100) in people with Type 2 Diabetes, run by Eli Lilly and Company at 135 sites in 16 countries.
Trial summary
The purpose of this study is to compare the safety and efficacy of the study drug tirzepatide to insulin lispro (U100) three times a day in participants with type 2 diabetes that are already on insulin glargine (U100), with or without metformin. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Type 2 Diabetes
- What is being tested?
- Tirzepatide and Insulin Lispro (U100)
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 1,428 participants
- Where
- 135 sitesin 16 countries
- Study dates
- 19 Oct 2020to 1 Nov 2022
- Phase
- Phase 3
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Have been diagnosed with type 2 diabetes mellitus (T2DM)
- Have HbA1c between ≥7.5% and ≤11%
- Have been treated for at least 90 days prior to day of screening with once or twice daily basal insulin with or without stable dose of metformin ≥1500 mg/day and up to maximum approved dose per country specific approved label, sulfonylureas or dipeptidyl peptidase 4 inhibitors
- Be of stable weight (± 5%) for at least 90 days
- Have a BMI ≥23 kilograms per meter squared (kg/m²) and ≤45 kg/m² at screening
Who cannot join
- Have type 1 diabetes mellitus
- Have had chronic or acute pancreatitis any time prior to study entry
- Have proliferative diabetic retinopathy or diabetic macular edema or nonproliferative diabetic retinopathy requiring immediate or urgent treatment
- Have disorders associated with slowed emptying of the stomach, have had any stomach surgeries for the purpose of weight loss, or are chronically taking drugs that directly affect gastrointestinal motility
- Have had a heart attack, stroke, or hospitalization for congestive heart failure in the past 2 months
- Have a personal or family history of medullary thyroid carcinoma or personal history of multiple endocrine neoplasia syndrome type 2
- Have been taking weight loss drugs, including over-the-counter medications during the last 3 months
- Have an estimated glomerular filtration rate <30 mL/minute/1.73 m² [for participants on metformin, estimated glomerular filtration rate <45 mL/min/1.73 m2 (or lower than the country-specific threshold for using the protocol-required dose of metformin per local label)]
Trial locations and contacts
135 sites in 16 countries.
135 sites in 16 countries
United States40 sites
Albany Medical College
Albany, New York, 12203
University of Colorado
Aurora, Colorado, 80045
Heritage Valley Medical Group, Inc.
Beaver, Pennsylvania, 15009
Excel Medical Clinical Trials
Boca Raton, Florida, 33434
Capital Diabetes and Endocrine Associates
Camp Springs, Maryland, 20746
J H. Stroger Hosp of Cook Co
Chicago, Illinois, 60612
Dallas Diabetes Research Center
Dallas, Texas, 75230
Diabetes and Thyroid Center of Fort Worth
Fort Worth, Texas, 76132
Valley Research
Fresno, California, 93720
Tribe Clinical Research, LLC
Greenville, South Carolina, 29607
I R & Health Center, Inc.
Hialeah, Florida, 33012
Juno Research
Houston, Texas, 77040
Biopharma Informatic, LLC
Houston, Texas, 77084
National Research Institute - Huntington Park
Huntington Park, California, 90255
MedStar Health Research Institute
Hyattsville, Maryland, 20782
Rocky Mountain Clinical Research
Idaho Falls, Idaho, 83404
Glacier View Research Institute - Endocrinology
Kalispell, Montana, 59901
National Research Institute - Huntington Park
Los Angeles, California, 90057
Southern Nh Diabetes and Endocrinology
Nashua, New Hampshire, 03060
Sun Coast Clinical Research, Inc
New Port Richey, Florida, 34652
Intend Research, LLC
Norman, Oklahoma, 73069
North Hills Medical Research
North Richland Hills, Texas, 76180
Valley Clinical Trials, Inc.
Northridge, California, 91325
National Research Institute - Huntington Park
Panorama City, California, 91402
South Broward Research
Pembroke Pines, Florida, 33027
Rainier Clinical Research Center
Renton, Washington, 98057
Endocrine and Metabolic Consultants
Rockville, Maryland, 20852
Texas Diabetes & Endocrinology, P.A.
Round Rock, Texas, 78681
Clinical Trials of Texas, Inc.
San Antonio, Texas, 78229
National Research Institute (NRI) - Santa Ana
Santa Ana, California, 92704
Consano Clinical Research, LLC
Shavano Park, Texas, 78231
Syed Research Consultants Llc
Sheffield, Alabama, 35660
Encompass Clinical Research
Spring Valley, California, 91978
Prairie Education and Research Cooperative
Springfield, Illinois, 62711
Martin Diagnostic Clinic
Tomball, Texas, 77375
University Clinical Investigators, Inc.
Tustin, California, 92780
Preferred Primary Care Physicians
Uniontown, Pennsylvania, 15401
Iowa Diabetes and Endocrinology Research Center
West Des Moines, Iowa, 50265
Metabolic Research Institute, Inc.
West Palm Beach, Florida, 33401
PMG Research of Wilmington
Wilmington, North Carolina, 28401
Brazil15 sites
Hospital PUC-CAMPINAS
Campinas, São Paulo, 13060-904
Cline Research Center
Curitiba, Paraná, 80030
QUANTA - Medicina Nuclear Alto da XV
Curitiba, Paraná, 80045-170
Centro de Pesq. em Diabetes e Doencas Endocrino Metabol.
Fortaleza, Ceará, 60430-350
CECIP - Centro de Estudos do Interior Paulista
Jaú, São Paulo, 17201-130
Centro de Pesquisas em Diabetes
Porto Alegre, Rio Grande do Sul, 90430-001
Instituto Brasil de Pesquisa Clínica - IBPCLIN
Rio de Janeiro, 20241180
CEMEC - Centro Multidisciplinar de Estudos Clinicos EPP Ltda
São Bernardo do Campo, São Paulo, 09715-090
ISPEM - Instituto São José dos Campos em Pesquisas Médicas
São José dos Campos, São Paulo, 12243-280
CPCLIN
São Paulo, São Paulo, 01228-200
IPEC - Instituto de Pesquisa Clínica
São Paulo, 01223-001
CPQuali Pesquisa Clínica
São Paulo, 01228-000
BR Trials - Ensaios Clínicos e Consultoria Ltda
São Paulo, 03325-050
CEPIC - Centro Paulista de Investigação Clínica
São Paulo, 04266-010
CEDOES
Vitória, Espírito Santo, 29055-450
Argentina12 sites
Instituto Médico Especializado (IME)
Buenos Aires, 1405
Asociación de Beneficencia Hospital Sirio Libanés
Buenos Aires, C1419AHN
Centro Médico Viamonte
CABA, Buenos Aires, C1120AAC
Investigaciones Medicas Imoba Srl
CABA, Buenos Aires, C1179AAB
Instituto Centenario
CABA, Buenos Aires, C1204AAD
CENUDIAB
Ciudad Autónoma de Buenos Aire, C1440AAD
Centro Diabetologico Dr Waitman
Córdoba, 5000
Centro Medico Privado San Vicente Diabetes
Córdoba, X5006CBI
CIPADI
Godoy Cruz, Mendoza Province, M5501ARP
Instituto de Investigaciones Clínicas Rosario (IIC-Rosario)- Sanatorio Delta
Rosario, Buenos Aires, S2000BIF
Instituto Médico Catamarca
Rosario, Santa Fe Province, 2000
Sanatorio Parque
Salta, 4400
Romania12 sites
CMI DNBM Dr. Pop Lavinia
Baia Mare, Maramureş, 430222
C.M.D.T.A. Neomed
Brasov, Brașov County, 500283
Cabinetul Medical Nicodiab SRL
Bucharest, 010507
SC Nutrilife SRL
Bucharest, 013671
Milena Sante SRL
Galati, 800001
SC Gama Diamed SRL
Mangalia, Constanța County, 905500
SC Endodigest SRL
Oradea, Bihor County, 410151
S. C. Grandmed S.R.L.
Oradea, Bihor County, 410159
SC Diabmed Dr Popescu Alexandrina SRL
Ploieşti, Prahova, 100179
SC Dianutrilife Medica SRL
Ploieşti, Prahova, 100561
SC Cosamext SRL
Târgu Mureş, Mureș County, 540098
Centrul Medical Dr. Negrisanu
Timișoara, Timiș County, 300456
Germany9 sites
InnoDiab Forschung Gmbh
Essen, North Rhine-Westphalia, 45136
Medizentrum Essen-Borbeck
Essen, North Rhine-Westphalia, 45355
MVZ im Altstadt-Carree Fulda GmbH
Fulda, 36037
Diabetologische Schwerpunktpraxis Harburg
Hamburg, 21073
Diabeteszentrum Hamburg West
Hamburg, 22607
Schwerpunktpraxis für Diabetes
Hof, Bavaria, 95030
RED-Institut GmbH
Oldenburg in Holstein, Schleswig-Holstein, 23758
Zentrum für klinische Studien
Saint Ingbert, Saarland, 66386
Gemeinschaftspraxis Dr. med. Josef und Wilma Großkopf
Wallerfing, 94574
Russia8 sites
Arkhangelsk Regional Clinical Hospital
Arkhangelsk, 163045
Scientific and Clinical Center for Precision and Regenerative Medicine
Kazan', 420012
Pirogov Russian National Research Medical University
Moscow, 109263
First Moscow State Medical University
Moscow, 119435
City Consultative and Diagnostic Center #1
Saint Petersburg, 194354
Saint-Petersburg State Budgetary Institution of Healthcare Institution
Saint Petersburg, 194354
St.Petersburg Polyclinic #117
Saint Petersburg, 194358
SPb GUZ "Diagnostic Center #85"
Saint Petersburg, 198255
Mexico5 sites
Instituto Jalisciense de Investigacion en Diabetes y Obesida
Guadalajara, Jalisco, 44600
Unidad de patologia Clinica
Guadalajara, Jalisco, 44650
Centro de Estudios de Investigacion Metabolicos y Cardiovasculares
Madero, Tamaulipas, 89440
Hospital Universitario "Dr. Jose Eleuterio Gonzalez"
Monterrey, N.L., 64460
Centro de Inv. Medica de Occidente, SC
Zapopan, Jalisco, 45116
Slovakia5 sites
Diacrin s.r.o.
Bratislava, Bratislava Region, 841 02
Diabetes care s.r.o.
Hnúšťa, 98101
Human care s.r.o.
Košice, Slovak Republic, 04012
MediVet s.r.o.
Malacky, Bratislava Region, 901 01
Areteus s.r.o.
Trebišov, 075 01
Spain5 sites
Complejo Hospitalario Universitario De Ferrol - Hospital Naval
Ferrol, La Coruna, 15405
Clínica Juaneda
Palma de Mallorca, 07014
Hospital Universitario Marqués de Valdecilla
Santander, Cantabria, 39011
Hospital Quiron Infanta Luisa
Seville, Andalusia, 41010
Hospital Universitario Virgen Macarena
Seville, 41009
Turkey (Türkiye)5 sites
Baskent Universitesi Adana Uygulama ve Arastirma Merkezi Yuregir Hastanesi
Adana, 01240
Akdeniz University Medical Faculty
Antalya, 07059
Aydin Adnan Menderes Universitesi
Aydin, 09010
Gaziantep University Medical Faculty
Gaziantep, 27310
Inonu Universitesi
Malatya, 44282
Czechia4 sites
Diabetologicka a obezitologicka ambulance
České Budějovice, 370 11
Diabetologicka ordinace pro dospele
Krnov, Moravian-Silesian Region, 79401
Diahelp s.r.o., Interni a diabetologicka ambulance
Pardubice, 530 02
ResTrial s.r.o.
Prague, 181 00
Greece4 sites
Athens Euroclinic
Athens, Attica, 11521
General Hospital of Thessaloniki Papageorgiou
N. Efkarpia, Thessaloniki, 56403
Iatriko Palaiou Falirou, Medical Center
Palaió Fáliro, Athens, 17562
Thermi Clinic
Thermi, Thessaloniki, 57001
Hungary4 sites
Szent Margit Rendelőintézet Nonprofit Kft
Budapest, 1032
TRANTOR'99 Bt. Anyagcsere Centrum
Budapest, 1213
Belinus Bt
Debrecen, Hajdú-Bihar, 4025
Debreceni Egyetem Klinikai Kozpont Belgyogyaszati Intezet
Debrecen, Hajdú-Bihar, 4032
Italy4 sites
Policlinico Mater Domini
Germaneto, Catanzaro, 88100
Ospedale Luigi Sacco
Milan, 20157
Policlinico Univ. Agostino Gemelli
Roma, 00168
Casa di Cura Multimedica-Policlinico Multispecialistico
Sesto San Giovanni, MI, 20099
Puerto Rico2 sites
Centro de Endocrinologia y Nutricion del Turabo
Caguas, PR, 00726
Paola Mansilla-Letelier, MD
Guaynabo, PR, 00970
About this study
Official title: A Randomized, Phase 3, Open-label Trial Comparing the Effect of the Addition of Tirzepatide Once Weekly Versus Insulin Lispro (U100) Three Times Daily in Participants With Type 2 Diabetes Inadequately Controlled on Insulin Glargine (U100) With or Without Metformin (SURPASS-6)
The purpose of this study is to compare the safety and efficacy of the study drug tirzepatide to insulin lispro (U100) three times a day in participants with type 2 diabetes that are already on insulin glargine (U100), with or without metformin.
- Conditions
- Type 2 Diabetes
- Being tested
- Tirzepatide, Insulin Lispro (U100)
- Keywords
- glucose-dependent insulinotropic polypeptide (GIP), glucagon-like peptide-1 (GLP-1), GIP/GLP-1 dual receptor agonist, T2DM
- Medical subject headings
- Diabetes Mellitus, Type 2
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
TirzepatideDrug
Also called LY3298176
Administered SC
Insulin Lispro (U100)Drug
Also called LY275585
Administered SC
| Study group | Role | What they receive |
|---|---|---|
| 5 mg Tirzepatide | Experimental | 5 milligrams (mg) tirzepatide administered subcutaneously (SC) once a week. Receives: Drug: Tirzepatide |
| 10 mg Tirzepatide | Experimental | 10 mg tirzepatide administered SC once a week. Receives: Drug: Tirzepatide |
| 15 mg Tirzepatide | Experimental | 15 mg tirzepatide administered SC once a week. Receives: Drug: Tirzepatide |
| Insulin Lispro | Active comparator | Insulin lispro 100 units per milliliter (U100) administered SC three times a day. Receives: Drug: Insulin Lispro (U100) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change From Baseline in Hemoglobin A1c (HbA1c) (Pooled Doses of Tirzepatide 5 mg, 10 mg and 15 mg)
HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured primarily to identify average plasma glucose concentration over prolonged periods of time. Least Squares (LS) mean was determined by mixed-model repeated measures (MMRM) model with covariates Baseline + Pooled Country + Baseline Metformin Use (Yes, No) + Treatment + Time + Treatment*Time (Type III sum of squares).
Measured: Baseline, Week 52
Secondary outcomes (9)
Change From Baseline in HbA1c
HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured primarily to identify average plasma glucose concentration over prolonged periods of time. LS mean was determined by MMRM model with covariates Baseline + Pooled Country + Baseline Metformin Use (Yes, No) + Treatment + Time + Treatment*Time (Type III sum of squares).
Measured: Baseline, Week 52
Percentage of Participants With HbA1c Target Values <7.0%
HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured to identify average plasma glucose concentration over prolonged periods of time.
Measured: Week 52
Change From Baseline in Body Weight
LS mean was determined by MMRM model with Baseline + Pooled Country + Baseline Metformin Use (Yes, No) + Baseline HbA1c Group (<=8.5%, >8.5%) + Treatment + Time + Treatment*Time (Type III sum of squares).
Measured: Baseline, Week 52
Change From Baseline in Fasting Serum Glucose
LS mean was determined by MMRM model with variables Baseline + Pooled Country + Baseline metformin Use (Yes, No) + Baseline HbA1c Group (<=8.5%, >8.5%) + Treatment + Time + Treatment*Time (Type III sum of squares).
Measured: Baseline, Week 52
Change From Baseline in Daily Average 7-Point Self-Monitored Blood Glucose (SMBG) Values
The self-monitored plasma glucose (SMBG) data were collected at the following 7 time points: Morning Premeal - Fasting, Morning 2-hour Post meal, Midday Premeal, Midday 2-hour Post meal, Evening Premeal, Evening 2-hour Post meal and Bedtime. The daily average was calculated as the average of the 7 blood glucose values collected on a particular day. LS mean was determined by MMRM model with variables Baseline + Pooled Country + Baseline Metformin Use (Yes, No) + Baseline HbA1c Group (<=8.5%, >8.5%) + Treatment + Time + Treatment*Time (Type III sum of squares).
Measured: Baseline, Week 52
Percentage of Participants Who Achieved HbA1c Target Value of <7.0% Without Hypoglycemia
Hemoglobin A1c (HbA1c) is the glycosylated fraction of hemoglobin A. HbA1c is measured to identify average plasma glucose concentration over prolonged periods of time.
Measured: Week 52
Percentage of Participants Who Achieved Weight Loss ≥5%
Percentage of Participants who Achieved Weight Loss ≥5% is reported here.
Measured: Week 52
Change From Baseline in 36-Item Short Form Health Survey (SF-36) Physical Component Summary (PCS) Score
The SF-36 is a health-related survey that assesses participant's quality of life and consists of 36 questions covering 8 health domains: physical functioning, bodily pain, role limitations due to physical problems and emotional problems, general health, mental health, social functioning, vitality, and two overall summary scores: physical component summary (PCS) and mental component summary (MCS) scores. PCS consisted of physical functioning, bodily pain, role-physical, and general health scales. PCS score is reported here. PCS domain is scored by summing individual items and transforming scores into a 0 to 100 scale with higher scores indicating better health status or functioning. LS mean was determined by analysis of covariance (ANCOVA) model with variables Baseline + Pooled Country + Baseline Metformin Use (Yes, No) + Baseline HbA1c Group (<=8.5%, >8.5%) + Treatment (Type III sum of squares).
Measured: Baseline, Week 52
Change From Baseline in 36-Item SF-36 Mental Component Summary (MCS) Score
The SF-36 is a health-related survey that assesses participant's quality of life and consists of 36 questions covering 8 health domains: physical functioning, bodily pain, role limitations due to physical problems and emotional problems, general health, mental health, social functioning, vitality, and two overall summary scores: physical component summary (PCS) and mental component summary (MCS) scores. MCS consisted of social functioning, vitality, mental health, and role-emotional scales. MCS score is reported here. MCS domain is scored by summing individual items and transforming scores into a 0 to 100 scale with higher scores indicating better health status or functioning. LS mean was determined by ANCOVA model with variables Baseline + Pooled Country + Baseline Metformin Use (Yes, No) + Baseline HbA1c Group (<=8.5%, >8.5%) + Treatment (Type III sum of squares).
Measured: Baseline, Week 52
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 Sep 2020
- Study start19 Oct 2020
- Primary completion11 Oct 2022
- Study completion1 Nov 2022
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for Type 2 DiabetesStudies of the same condition, open and under way.
- More trials run by Eli Lilly and CompanyThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 1,428 participants (actual)
Sponsor and investigators
- Lead sponsor
- Eli Lilly and Company
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- 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), Study director, Eli Lilly and Company
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04537923
- Sponsor's protocol ID
- 17204
- Other IDs
- I8F-MC-GPHD, 2020-000284-23
- Acronym
- SURPASS-6
- Status last verified
- Oct 2023
- First submitted
- 2 Sep 2020
- Last updated
- 2 Nov 2023
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: 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.
Publications
Bajaj HS, Billings LK, Sharma P, Levine JA, Rodriguez A, Patel H. Tirzepatide as an Add-on for Participants with Inadequate Glycemic Control Using Basal Insulin: Pooled Subgroup Analysis of SURPASS-5 and -6. Diabetes Ther. 2026 May;17(5):787-797. doi: 10.1007/s13300-026-01859-3. Epub 2026 Apr 10.
PubMed 41961454Rosenstock J, Frias JP, Rodbard HW, Tofe S, Sears E, Huh R, Fernandez Lando L, Patel H. Tirzepatide vs Insulin Lispro Added to Basal Insulin in Type 2 Diabetes: The SURPASS-6 Randomized Clinical Trial. JAMA. 2023 Nov 7;330(17):1631-1640. doi: 10.1001/jama.2023.20294.
PubMed 37786396
Study at a glance
From the registry record, last updated by the sponsor on 2 Nov 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Randomized, Phase 3, Open-label Trial Comparing the Effect of the Addition of Tirzepatide Once Weekly Versus Insulin Lispro (U100) Three Times Daily in Participants With Type 2 Diabetes Inadequately Controlled on Insulin Glargine (U100) With or Without Metformin (SURPASS-6)
- ClinicalTrials.gov ID
- NCT04537923
- Acronym / sponsor ID
- SURPASS-6 / 17204
- Conditions
- Type 2 Diabetes
- Keywords
- glucose-dependent insulinotropic polypeptide (GIP), glucagon-like peptide-1 (GLP-1), GIP/GLP-1 dual receptor agonist, T2DM
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 1,428 participants (actual)
- Lead sponsor
- Eli Lilly and CompanyIndustry (pharma, biotech, devices)
- Study start
- 19 Oct 2020 (actual)
- Primary completion
- 11 Oct 2022 (actual)
- Study completion
- 1 Nov 2022 (actual)
- First posted
- 3 Sep 2020 (actual)
- Results
- Posted 2 Nov 2023
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to compare the safety and efficacy of the study drug tirzepatide to insulin lispro (U100) three times a day in participants with type 2 diabetes that are already on insulin glargine (U100), with or without metformin.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| 5 mg Tirzepatide | Experimental | Drug: Tirzepatide5 milligrams (mg) tirzepatide administered subcutaneously (SC) once a week. |
| 10 mg Tirzepatide | Experimental | Drug: Tirzepatide10 mg tirzepatide administered SC once a week. |
| 15 mg Tirzepatide | Experimental | Drug: Tirzepatide15 mg tirzepatide administered SC once a week. |
| Insulin Lispro | Active comparator | Drug: Insulin Lispro (U100)Insulin lispro 100 units per milliliter (U100) administered SC three times a day. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Have been diagnosed with type 2 diabetes mellitus (T2DM)
- Have HbA1c between ≥7.5% and ≤11%
- Have been treated for at least 90 days prior to day of screening with once or twice daily basal insulin with or without stable dose of metformin ≥1500 mg/day and up to maximum approved dose per country specific approved label, sulfonylureas or dipeptidyl peptidase 4 inhibitors
- Be of stable weight (± 5%) for at least 90 days
- Have a BMI ≥23 kilograms per meter squared (kg/m²) and ≤45 kg/m² at screening
Key exclusion criteria (8 listed)
- Have type 1 diabetes mellitus
- Have had chronic or acute pancreatitis any time prior to study entry
- Have proliferative diabetic retinopathy or diabetic macular edema or nonproliferative diabetic retinopathy requiring immediate or urgent treatment
- Have disorders associated with slowed emptying of the stomach, have had any stomach surgeries for the purpose of weight loss, or are chronically taking drugs that directly affect gastrointestinal motility
- Have had a heart attack, stroke, or hospitalization for congestive heart failure in the past 2 months
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| TirzepatideAlso: LY3298176Administered SC | Drug | 10 mg Tirzepatide, 15 mg Tirzepatide, 5 mg Tirzepatide |
| Insulin Lispro (U100)Also: LY275585Administered SC | Drug | Insulin Lispro |
Primary outcome
Change From Baseline in Hemoglobin A1c (HbA1c) (Pooled Doses of Tirzepatide 5 mg, 10 mg and 15 mg)
Time frame: Baseline, Week 52
HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured primarily to identify average plasma glucose concentration over prolonged periods of time. Least Squares (LS) mean was determined by mixed-model repeated measures (MMRM) model with covariates Baseline + Pooled Country + Baseline Metformin Use (Yes, No) + Treatment + Time + Treatment*Time (Type III sum of squares).
9 secondary outcomes
Change From Baseline in HbA1c
Time frame: Baseline, Week 52
Percentage of Participants With HbA1c Target Values <7.0%
Time frame: Week 52
Change From Baseline in Body Weight
Time frame: Baseline, Week 52
Change From Baseline in Fasting Serum Glucose
Time frame: Baseline, Week 52
Change From Baseline in Daily Average 7-Point Self-Monitored Blood Glucose (SMBG) Values
Time frame: Baseline, Week 52
Percentage of Participants Who Achieved HbA1c Target Value of <7.0% Without Hypoglycemia
Time frame: Week 52
Percentage of Participants Who Achieved Weight Loss ≥5%
Time frame: Week 52
Change From Baseline in 36-Item Short Form Health Survey (SF-36) Physical Component Summary (PCS) Score
Time frame: Baseline, Week 52
Change From Baseline in 36-Item SF-36 Mental Component Summary (MCS) Score
Time frame: Baseline, Week 52
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Nov 2023.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Derived from this study: PubMed 41961454Bajaj HS, Billings LK, Sharma P, Levine JA, Rodriguez A, Patel H. Tirzepatide as an Add-on for Participants with Inadequate Glycemic Control Using Basal Insulin: Pooled Subgroup Analysis of SURPASS-5 and -6. Diabetes Ther. 2026 May;17(5):787-797. doi: 10.1007/s13300-026-01859-3. Epub 2026 Apr 10.
- Derived from this study: PubMed 37786396Rosenstock J, Frias JP, Rodbard HW, Tofe S, Sears E, Huh R, Fernandez Lando L, Patel H. Tirzepatide vs Insulin Lispro Added to Basal Insulin in Type 2 Diabetes: The SURPASS-6 Randomized Clinical Trial. JAMA. 2023 Nov 7;330(17):1631-1640. doi: 10.1001/jama.2023.20294.
- A Study of Tirzepatide (LY3298176) Versus Insulin Lispro (U100) in Participants With Type 2 Diabetes Inadequately Controlled on Insulin Glargine (U100) With or Without Metformin (SURPASS-6)Link provided by the sponsor.
- Individual participant dataSharing planned: Yes. 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.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
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) study director
Eli Lilly and Company
135 sites in 16 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Tirzepatide and Insulin Lispro (U100) in people with Type 2 Diabetes, run by Eli Lilly and Company at 135 sites in 16 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 2 Nov 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 135 sites in United States, Brazil, Argentina, Romania, Germany and 11 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 2 Nov 2023). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change From Baseline in Hemoglobin A1c (HbA1c) (Pooled Doses of Tirzepatide 5 mg, 10 mg and 15 mg) (time frame: Baseline, Week 52). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT04537923, which also lists 2 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Nov 2023.