Research
Hormonal
Tirzepatide is associated with a significantly higher incidence of gastrointestinal adverse events (nausea, vomiting, diarrhea, decreased appetite) compared to placebo, insulin, and GLP-1 RAs, particularly at higher doses.
Expect gastrointestinal side effects like nausea and diarrhea, especially when starting or increasing the dose. These are common but often improve over time. Discuss management strategies with your doctor.
StrongQualifiesHIGH confidence
The incidence of gastrointestinal adverse events, including nausea, vomiting, diarrhea, and decreased appetite, was significantly higher at all doses of tirzepatide compared to placebo... When compared with GLP-1 RAs, higher doses of tirzepatide were associated with increased risk of nausea, diarrhea, and decreased appetite, but not vomiting.
Why this rating
Meta-analysis of 14 RCTs.
Source
The Efficacy and Safety of Tirzepatide in Patients with Diabetes and/or Obesity: Systematic Review and Meta-Analysis of Randomized Clinical Trials
Ligang Liu et al. · Pharmaceuticals · 2025
DOI 10.3390/ph18050668
Meta-analysis · 14 studiesCited 15×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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