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NCT03322631

A Study of Tirzepatide (LY3298176) in Japanese Participants With Type 2 Diabetes

Completed Phase 1 Results posted Last updated 23 March 2023
What this trial tests

Phase 1 trial testing Tirzepatide in Type 2 Diabetes Mellitus in 48 participants. Completed in 28 November 2018.

Timeline
15 November 2017
Primary endpoint
29 May 2018
28 November 2018

Quick facts

Lead sponsorEli Lilly and Company
PhasePhase 1
StatusCompleted
Study typeINTERVENTIONAL
Allocationrandomized
Designparallel
Maskingdouble
Primary purposebasic science
Enrollment48
Start date15 November 2017
Primary completion29 May 2018
Estimated completion28 November 2018
Sites2 locations across Japan

Drugs / interventions tested

Conditions studied

Sponsor

Eli Lilly and Company — full company profile →

Who can join

Adults 20 to 70, any sex, with Type 2 Diabetes Mellitus. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Number of Participants With One or More Serious Adverse Event(s) (SAEs) Considered by the Investigator to be Related to Study Drug Administration Primary · Baseline through Day 85

Safety was assessed from time of consent through end of study (up to 85 days). Data presented are the number of participants who experienced 1 or more SAEs considered by the investigator to be related to study drug. A summary of SAEs and other non-serious AEs, regardless of causality is located in the Reported Adverse Events section of this record.

GroupValue95% CI
Placebo0
2.5 mg/5 mg/10 mg Tirzepatide (Cohort 1)0
5 mg/10 mg/15 mg Tirzepatide (Cohort 2)0
5 mg Tirzepatide (Cohort 3)0
Pharmacokinetics (PK): Maximum Observed Concentration (Cmax) of Tirzepatide Secondary · Predose, 8, 24, 48, 72 and 168 hours post dose for Day 1 administration, and Predose, 8, 24, 48, and 168 hours post dose for Day 50 administration

Pharmacokinetics (PK): Maximum observed drug concentration (Cmax) of Tirzepatide in plasma.

Day 1
GroupValue95% CI
2.5 mg/5 mg/10 mg Tirzepatide (Cohort 1)215± 18
5 mg/10 mg/15 mg Tirzepatide (Cohort 2)442± 23
5 mg Tirzepatide (Cohort 3)364± 20
Day 50
GroupValue95% CI
2.5 mg/5 mg/10 mg Tirzepatide (Cohort 1)1520± 15
5 mg/10 mg/15 mg Tirzepatide (Cohort 2)2270± 17
5 mg Tirzepatide (Cohort 3)838± 22
PK: Area Under the Concentration Versus Time Curve (AUC) of Tirzepatide Secondary · Predose, 8, 24, 48, 72 and 168 hours post dose for Day 1 administration, and Predose, 8, 24, 48, and 168 hours post dose for Day 50 administration

Area under the concentration versus time curve from time zero to tau (τ) of Tirzepatide (AUC\[0- τ\]), where tau is dosing interval of (0-168 hours).

Day 1
GroupValue95% CI
2.5 mg/5 mg/10 mg Tirzepatide (Cohort 1)26100± 27
5 mg/10 mg/15 mg Tirzepatide (Cohort 2)54400± 16
5 mg Tirzepatide (Cohort 3)48800± 16
Day 50
GroupValue95% CI
2.5 mg/5 mg/10 mg Tirzepatide (Cohort 1)192000± 16
5 mg/10 mg/15 mg Tirzepatide (Cohort 2)285000± 15
5 mg Tirzepatide (Cohort 3)104000± 19
Pharmacodynamics (PD): Change From Baseline to 8 Weeks in Fasting Plasma Glucose Secondary · Baseline, Week 8

Change from baseline to 8 weeks in Fasting Plasma Glucose was measured to investigate the PD effect of Tirzepatide after multiple SC doses administered to Japanese patients with T2DM

GroupValue95% CI
Placebo-4.0± 23.7
2.5 mg/5 mg/10 mg Tirzepatide (Cohort 1)-77.5± 24.2
5 mg/10 mg/15 mg Tirzepatide (Cohort 2)-72.6± 30.9
5 mg Tirzepatide (Cohort 3)-51.7± 28.9

Adverse events — posted to ClinicalTrials.gov

Time frame: Up To 85 days. Reporting threshold: 5%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

Placebo
Serious: 0/9 (0%)
Deaths: 0/9
2.5 mg/5 mg/10 mg Tirzepatide (Cohort 1)
Serious: 0/12 (0%)
Deaths: 0/12
5 mg/10 mg/15 mg Tirzepatide (Cohort 2)
Serious: 0/16 (0%)
Deaths: 0/16
5 mg Tirzepatide (Cohort 3)
Serious: 0/11 (0%)
Deaths: 0/11
Other adverse events (22 terms — click to expand)

ReactionSystemPlacebo2.5 mg/5 mg/10 mg Tirzepat…5 mg/10 mg/15 mg Tirzepati…5 mg Tirzepatide (Cohort 3)
Decreased appetiteMetabolism and nutrition disorders
ConstipationGastrointestinal disorders
DiarrhoeaGastrointestinal disorders
Abdominal discomfortGastrointestinal disorders
Abdominal distensionGastrointestinal disorders
DyspepsiaGastrointestinal disorders
HeadacheNervous system disorders
NauseaGastrointestinal disorders
VomitingGastrointestinal disorders
Blood triglycerides increasedInvestigations
Lipase increasedInvestigations
AnaemiaBlood and lymphatic system disorders
AstheniaGeneral disorders
MalaiseGeneral disorders
BronchitisInfections and infestations
GastroenteritisInfections and infestations
Viral upper respiratory tract infectionInfections and infestations
Amylase increasedInvestigations
Blood bilirubin increasedInvestigations
Weight decreasedInvestigations
White blood cell count increasedInvestigations
ArthralgiaMusculoskeletal and connective tissue disorders

Data from ClinicalTrials.gov NCT03322631 adverse events section.

Sponsor's own description

The purposes of this study are to determine: * The safety of tirzepatide and any side effects that might be associated with it. * How much tirzepatide gets into the bloodstream and how long it takes the body to remove it. * How tirzepatide affects the levels of blood sugar. This study includes eight weekly doses of tirzepatide or placebo given as subcutaneous (SC) injections just under the skin. The study will last about 16 weeks (total), including screening and follow-up. This study is for research purposes only and is not intended to treat any medical conditions.

Publications & conference data

4 peer-reviewed publications reference this trial (live from Europe PMC):

  1. A phase 1 multiple-ascending dose study of tirzepatide in Japanese participants with type 2 diabetes.
    Furihata K, Mimura H, Urva S, Oura T, et al · · 2022 · cited 48× · PMID 34647404 · DOI 10.1111/dom.14572
  2. Clinical perspectives on the use of the GIP/GLP-1 receptor agonist tirzepatide for the treatment of type-2 diabetes and obesity.
    Gallwitz B. · · 2022 · cited 42× · PMID 36313764 · DOI 10.3389/fendo.2022.1004044
  3. Comparative Efficacy and Safety of Tirzepatide in Asians and Non-Asians with Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis.
    Cui Y, Yao J, Qiu X, Guo C, et al · · 2024 · cited 5× · PMID 38402331 · DOI 10.1007/s13300-024-01540-7
  4. The adverse effects associated with tirzepatide use in patients at increased risk of cardiovascular events: a systematic review with meta-analysis and Trial Sequential Analysis.
    Sillassen CDB, Faltermeier P, Bjerg JL, Andersen RK, et al · · 2026 · PMID 41896878 · DOI 10.1186/s12916-026-04824-w

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