Obesity

Real‐World Adverse Event Reporting Patterns of Tirzepatide Versus Semaglutide: A Stratified Study of General and Healthcare Professional Cohorts in FAERS

Diabetes Obes MetabPublished Pharmacovigilance study

Main finding · GI disorders reporting (general population)Result — go to the resultGI RORR 0.58 95% CI 0.57–0.59

Authors' conclusion

This FAERS-based analysis identifies distinct AE reporting patterns between tirzepatide and semaglutide that are sensitive to reporter type; all findings are hypothesis-generating and require confirmation with defined exposure denominators.

Study context

Population
FAERS adverse event reports, May 2022-June 2026; Healthcare professional (HCP) reports 5.04% vs 23.42%FAERS reports
Participants
151,654 vs 64,987
Comparison
Tirzepatide vs semaglutide
  • Tirzepatiden = 151,654
  • Semaglutiden = 64,987reference
Outcome
GI disorders reporting (general population)
Methodological detailsdisproportionality analysis of FAERS, four-method signal convergence (ROR, PRR, information component (IC), empirical Bayes geometric mean (EBGM)), Benjamini-Hochberg false discovery rate (FDR), stratified general population and HCP-restricted cohorts, sensitivity analyses by indication, seriousness, geography and calendar quarter
  • Disproportionality analysis of FAERS
  • Four-method signal convergence (ROR, PRR, IC, EBGM)
  • Benjamini-Hochberg FDR
  • Stratified general population and HCP-restricted cohorts
  • Sensitivity analyses by indication, seriousness, geography and calendar quarter

Main finding

As reported in the abstract

GI RORR

0.58

95% CI 0.57–0.59

By group

Semaglutide

GI ROR
3.64
Metabolic disorders ROR
4.25

Semaglutide

GI ROR3.64
Metabolic disorders ROR4.25

Further findings

OutcomeTirzepatideSemaglutideRORR (95% CI)
Diabetic ketoacidosis reporting, HCP cohort
ROR— not stated in the abstract3.52
Hypoglycaemia reportingHigher hypoglycaemia reporting with tirzepatide1.91 (1.49–2.44)
Gastrointestinal and eye disorder reporting, HCP cohort
GI ROR2.53— not stated in the abstract
Eye disorders ROR— not stated in the abstract2.61
Metabolic disorders reporting, general population
ROR— not stated in the abstract4.25

— not stated in the abstract

Pancreatitis reporting within T2D

Pancreatitis signalled for both agents but attenuated to equivalence within T2D
RORR 0.98 (95% CI 0.83-1.15)

Diabetic ketoacidosis reporting, HCP cohort

DKA signalled exclusively for semaglutide in the HCP cohort

Metabolic disorders reporting, general population

Only semaglutide met four-method criteria for metabolic disorders

Sensitivity analyses (indication, seriousness, geography, calendar quarter)

All sensitivity analyses confirmed directional stability of comparative reporting patterns across subgroups

Original publication

Real‐World Adverse Event Reporting Patterns of Tirzepatide Versus Semaglutide: A Stratified Study of General and Healthcare Professional Cohorts in FAERS. Diabetes Obes Metab. Published 21 September 2026. doi:10.1111/dom.71373

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