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Self-Reported Side Effects of Semaglutide and Tirzepatide in Online Communities

Sehgal, N. K. R.; Tronieri, J. S.; Ungar, L.; Guntuku, S. C.

2026-03-13 health informatics
10.64898/2026.03.12.26348253 medRxiv
Show abstract

Social media can reveal patient experiences with glucagon-like peptide-1 receptor agonists (GLP-1 RAs) that extend beyond clinical trial data. We analyzed 410,198 Reddit posts (May 2019-June 2025) mentioning semaglutide or tirzepatide. A total of 67,008 users self-reported using these medications, and 43.5% described at least one side effect. Gastrointestinal symptoms predominated, including nausea (36.9%), fatigue (16.7%), vomiting (16.3%), constipation (15.3%), and diarrhea (12.6%). Notably, reproductive symptoms (e.g., menstrual irregularities) and temperature-related complaints (e.g., chills, hot flashes) emerged as unrecognized potential effects. These findings highlight patient concerns not well captured in current labeling or trials. Large-scale social media analysis can complement traditional pharmacovigilance by detecting emerging safety signals and expanding understanding of the real-world safety profile of GLP-1 RAs.

Published in Nature Health · not in our set (fewer than 10 published preprints to learn from) · training set

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