GLP-1 Evidence

Not medical advice. A record of published research and our assessments of it. The limits

FDA prescribing information: Trulicity (DULAGLUTIDE) - label effective 2026-06-16

Design
Regulatory document · 568 participants · Mixed outcome
Match to healthy normal-weight adults aged 55–75
Population unclear[Auto] Review/guidance/regulatory document rather than a primary study; applicability depends on the underlying studies.
Could weight loss explain it?
Not applicable[Auto] Not a primary outcome study.
Study tier
Not rated[Auto] Review, guidance, regulatory document or model without new primary outcome data.
Assessment
Version 1 · automatic, not yet reviewed by a person · Sep 13, 2026

Study facts come from the paper. Population match, weight-loss explanation and study tier are our judgments, made against the reference group of healthy normal-weight adults aged 55–75.

[Auto, unreviewed; last sentences of abstract] Patients with a personal or family history of medullary thyroid carcinoma or in patients with Multiple Endocrine Neoplasia syndrome type 2 ( 4 ). Patients with a serious hypersensitivity reaction to dulaglutide or any of the product components ( 4 ).

01Findings

What the study reported

Drugs
Liraglutide, Dulaglutide
Dose
0.75 mg
Treatment duration
8 years
Comparator
placebo
Primary outcome
Not extracted
Effect
Not extracted
95% confidence interval
Not extracted
Follow-up
23.8 weeks
Adverse events
Not extracted
Limitations
Auto-classified from abstract only; effect estimates, adverse events and limitations not extracted. Requires manual review.

Who was studied

Age min
75
Diabetes status
type 2 diabetes present (all or most)
Sample size
568

Study quality details

Study design
Regulatory document
Sample size
568
Randomization
no
Blinding
not stated
Comparator
placebo
Follow up duration
23.8 weeks
Outcome type
mixed
Replication
not assessed (auto)
Consistency with other evidence
not assessed (auto)
Population applicability
UNKNOWN
Statistical precision
not extracted
Risk of bias
not assessed (auto)
Funding conflicts
unclear
Peer review status
no
02Funding

Funding and conflicts

Funding
not reported in abstract
Industry funded
Unclear
Manufacturer
None identified
Sponsor role
not reported in abstract
Author conflicts
not available in metadata
Independent replication
unknown

Funding is shown on every study and never used to score it.

04Source

The source, as retrieved

Abstract

[BOXED_WARNING] WARNING: RISK OF THYROID C-CELL TUMORS In male and female rats, dulaglutide causes a dose-related and treatment-duration-dependent increase in the incidence of thyroid C-cell tumors (adenomas and carcinomas) after lifetime exposure. It is unknown whether TRULICITY causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans as human relevance of dulaglutide-induced rodent thyroid C-cell tumors has not been determined [see Warnings and Precautions ( 5.1 ), and Nonclinical Toxicology ( 13.1 )] . TRULICITY is contraindicated in patients with a personal or family history of MTC and in patients with Multiple Endocrine Neoplasia syndrome type 2 (MEN 2). Counsel patients regarding the potential risk of MTC with use of TRULICITY and inform them of symptoms of thyroid tumors (e.g., mass in the neck, dysphagia, dyspnea, persistent hoarseness). Routine monitoring of serum calcitonin or using thyroid ultrasound is of uncertain value for early detection of MTC in patients treated with TRULICITY [see Contraindications ( 4 ) and Warnings and Precautions ( 5.1 )] . WARNING: RISK OF THYROID C-CELL TUMORS See full prescribing information for complete boxed warning. Dulaglutide causes thyroid C-cell tumors in rats. It is unknown whether TRULICITY causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans as the human relevance of dulaglutide-induced rodent thyroid C-cell tumors has not been determined ( 5.1 , 13.1 ). TRULICITY is contraindicated in patients with a personal or family history of MTC and in patients with Multiple Endocrine Neoplasia syndrome type 2 (MEN 2). Counsel patients regarding the potential risk of MTC and symptoms of thyroid tumors ( 4 , 5.1 ). [WARNINGS_AND_CAUTIONS] 5 WARNINGS AND PRECAUTIONS Thyroid C-cell Tumors: See Boxed Warning ( 5.1 ). Acute Pancreatitis: Has been observed in patients treated with GLP-1 receptor agonists, including TRULICITY. Discontinue if pancreatitis is suspected ( 5.2 ). Hypoglycemia: Concomitant use with an insulin secretagogue or insulin may increase the risk of hypoglycemia, including severe hypoglycemia. Reducing the dose of insulin secretagogue or insulin may be necessary ( 5.3 ). Hypersensitivity Reactions: Serious hypersensitivity reactions (e.g., anaphylactic reactions and angioedema) have occurred. Discontinue TRULICITY and promptly seek medical advice ( 5.4 ). Acute Kidney Injury Due to Volume Depletion: Monitor renal function in patients reporting adverse reactions that could lead to volume depletion ( 5.5 ). Severe Gastrointestinal Adverse Reactions: Use may be associated with gastrointestinal adverse reactions, sometimes severe. TRULICITY is not recommended in patients with severe gastroparesis ( 5.6 ). Diabetic Retinopathy Complications: Have been reported in a cardiovascular outcomes trial. Monitor patients with a history of diabetic retinopathy ( 5.7 ). Acute Gallbladder Disease: If cholelithiasis or cholecystitis are suspected, gallbladder studies are indicated ( 5.8 ). Pulmonary Aspiration During General Anesthesia or Deep Sedation: Has been reported in patients receiving GLP-1 receptor agonists undergoing elective surgeries or procedures. Instruct patients to inform healthcare providers of any planned surgeries or procedures ( 5.9 ). 5.1 Risk of Thyroid C-cell Tumors In male and female rats, dulaglutide causes a dose-related and treatment-duration-dependent increase in the incidence of thyroid C-cell tumors (adenomas and carcinomas) after lifetime exposure [see Nonclinical Toxicology ( 13.1 )] . Glucagon-like peptide-1 (GLP-1) receptor agonists have induced thyroid C-cell adenomas and carcinomas in mice and rats at clinically relevant exposures. It is unknown whether TRULICITY will cause thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans, as the human relevance of dulaglutide-induced rodent thyroid C-cell tumors has not been determined. One case of MTC was reported in a patient treated with TRULICITY in a clinical trial. This patient had pretreatment calcitonin levels approximately 8 times the upper limit of normal (ULN). An additional case of C-cell hyperplasia with elevated calcitonin levels following treatment was reported in the cardiovascular outcomes trial (REWIND). Cases of MTC in patients treated with liraglutide, another GLP-1 receptor agonist, have been reported in the postmarketing period; the data in these reports are insufficient to establish or exclude a causal relationship between MTC and GLP-1 receptor agonist use in humans. TRULICITY is contraindicated in patients with a personal or family history of MTC or in patients with MEN 2. Counsel patients regarding the potential risk for MTC with the use of TRULICITY and inform them of symptoms of thyroid tumors (e.g. a mass in the neck, dysphagia, dyspnea, persistent hoarseness). Routine monitoring of serum calcitonin or using thyroid ultrasound is of uncertain value for early detection of MTC in patients treated with TRULICITY. Such monitoring may increase the risk of unnecessary procedures, due to the low test specificity for serum calcitonin and a high background incidence of thyroid disease. Significantly elevated serum calcitonin values may indicate MTC and patients with MTC usually have calcitonin values >50 ng/L. If serum calcitonin is measured and found to be elevated, the patient should be further evaluated. Patients with thyroid nodules noted on physical examination or neck imaging should also be further evaluated. 5.2 Acute Pancreatitis Acute pancreatitis, including fatal and non-fatal hemorrhagic or necrotizing pancreatitis, has been observed in patients treated with GLP-1 receptor agonists, including TRULICITY [see Adverse Reactions ( 6 )] . Af [ADVERSE_REACTIONS] 6 ADVERSE REACTIONS The following serious reactions are described below or elsewhere in the prescribing information: Risk of Thyroid C-cell Tumors [see Warnings and Precautions ( 5.1 )] Acute Pancreatitis [see Warnings and Precautions ( 5.2 )] Hypoglycemia with Concomitant Use of Insulin Secretagogues or Insulin [see Warnings and Precautions ( 5.3 )] Hypersensitivity Reactions [see Warnings and Precautions ( 5.4 )] Acute Kidney Injury Due to Volume Depletion [see Warnings and Precautions ( 5.5 )] Severe Gastrointestinal Adverse Reactions [see Warnings and Precautions ( 5.6 )] Diabetic Retinopathy Complications in Patients with a History of Diabetic Retinopathy [see Warnings and Precautions ( 5.7 )] Acute Gallbladder Disease [see Warnings and Precautions ( 5.8 )] Pulmonary Aspiration During General Anesthesia or Deep Sedation [see Warnings and Precautions ( 5.9 )] Most common adverse reactions (incidence ≥5%) are nausea, diarrhea, vomiting, abdominal pain, and decreased appetite ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact Eli Lilly and Company at 1-800-LillyRx (1-800-545-5979) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice. Adverse Reactions in the Clinical Trials in Adults with Type 2 Diabetes Mellitus Pool of Adult Placebo-Controlled Trials for TRULICITY 0.75 mg and 1.5 mg Doses The data in Table 1 are derived from a pool of placebo-controlled trials and include 1,670 adult patients with type 2 diabetes mellitus exposed to TRULICITY with a mean duration of exposure of 23.8 weeks [see Clinical Studies ( 14 )] . The mean age of patients was 56 years, 1% were 75 years or older and 53% were male. The population was 69% White, 7% Black or African American, 13% Asian; 30% were of Hispanic or Latino ethnicity. At baseline, the population had diabetes for an average of 8 years, a mean HbA1c of 8.0%, and 2.5% of the population reported retinopathy. Baseline estimated renal function was normal or mildly impaired (eGFR ≥60 mL/min/1.73 m 2 ) in 96%. Table 1 shows adverse reactions, excluding hypoglycemia, occurring in ≥5% of TRULICITY treated adult patients and more commonly than placebo in a pool of placebo-controlled trials. Table 1: Adverse Reactions in Pool of Placebo-Controlled Trials That Occurred in ≥5% of TRULICITY-Treated Adult Patients with Type 2 Diabetes Mellitus a Includes diarrhea, fecal volume increased, frequent bowel movements. b Includes retching, vomiting, vomiting projectile. c Includes abdominal discomfort, abdominal pain, abdominal pain lower, abdominal pain upper, abdominal tenderness, gastrointestinal pain. d Includes fatigue, asthenia, malaise. Note: Percentages reflect the number of patients that reported at least 1 treatment-emergent occurrence of the adverse reaction. Adverse Reaction Placebo (N=568) % TRULICITY 0.75 mg (N=836) % TRULICITY 1.5 mg (N=834) % Nausea 5.3 12.4 21.1 Diarrhea a 6.7 8.9 12.6 Vomiting b 2.3 6.0 12.7 Abdominal Pain c 4.9 6.5 9.4 Decreased Appetite 1.6 4.9 8.6 Dyspepsia 2.3 4.1 5.8 Fatigue d 2.6 4.2 5.6 Gastrointestinal Adverse Reactions In the pool of placebo-controlled trials, gastrointestinal (GI) adverse reactions occurred more frequently among patients who received TRULICITY compared to patients who received placebo (placebo 21%, 0.75 mg 32%, 1.5 mg 41%). A higher percentage of patients who received TRULICITY 0.75 mg (1.3%) and TRULICITY 1.5 mg (3.5%) discontinued treatment due to GI adverse reactions than patients who received placebo (0.2%). Investigators graded the severity of GI adverse reactions that occurred in those treated with 0.75 mg and 1.5 mg of TRULICITY as “mild” in 58% and 48% of cases, respectively, “moderate” in 35% and 42% of cases, respectively, or “severe” [DRUG_INTERACTIONS] 7 DRUG INTERACTIONS Oral Medications: Delays gastric emptying and has the potential to reduce the rate of absorption of concomitantly administered oral medications ( 7.1 ). 7.1 Oral Medications TRULICITY delays gastric emptying and thus has the potential to reduce the rate of absorption of concomitantly administered oral medications. The delay in gastric emptying is dose-dependent but is attenuated with the recommended dose escalation to higher doses of TRULICITY [see Dosage and Administration ( 2.1 )] . The delay is largest after the first dose and diminishes with subsequent doses. In clinical pharmacology studies, TRULICITY 1.5 mg did not affect the absorption of the tested orally administered medications to a clinically relevant degree [see Clinical Pharmacology ( 12.3 )] . There is limited experience with the use of concomitant medications in clinical trials with TRULICITY doses of 3 mg and 4.5 mg. Monitor drug levels of oral medications with a narrow therapeutic index (e.g., warfarin) when concomitantly administered with TRULICITY. 7.2 Concomitant Use with an Insulin Secretagogue (e.g., Sulfonylurea) or with Insulin When initiating TRULICITY, consider reducing the dose of concomitantly administered insulin secretagogues (such as sulfonylureas) or insulin to reduce the risk of hypoglycemia [see Warnings and Precautions ( 5.3 ) and Adverse Reactions ( 6.1 )]. [CONTRAINDICATIONS] 4 CONTRAINDICATIONS TRULICITY is contraindicated in patients with: Personal or family history of medullary thyroid carcinoma (MTC) or in patients with Multiple Endocrine Neoplasia syndrome type 2 (MEN 2) [see Warnings and Precautions ( 5.1 )] . Serious hypersensitivity reaction to dulaglutide or to any of the product components. Serious hypersensitivity reactions including anaphylactic reactions and angioedema have been reported with TRULICITY [see Warnings and Precautions ( 5.4 )] . Patients with a personal or family history of medullary thyroid carcinoma or in patients with Multiple Endocrine Neoplasia syndrome type 2 ( 4 ). Patients with a serious hypersensitivity reaction to dulaglutide or any of the product components ( 4 ).

Where this record came from

SourceRetrievedIdentifier
openfdaSep 13, 2026463050bd-2b1c-40f5-b3c3-0a04bb433309
first ingestion