Cameron M. Thompson, Michael B. Andrews, Douglas G. Adler
Background Treatments for metastatic, unresectable, or treatment-resistant gastrointestinal stromal tumors (GIST) include avapritinib, imatinib, regorafenib, ripretinib, and sunitinib. The FDA Adverse Event Reporting System (FAERS) database collects medication-related adverse events (AEs).Design and methods Reports in the FAERS database from each medication’s FDA approval to June 30, 2025 were analyzed. Reports containing other medications or indications outside of GIST treatment were excluded.Results Avapritinib was associated with fatigue (n = 826, 10.2%), nausea/vomiting (n = 574, 7.1%), eye/facial swelling (n = 631, 7.8%), diarrhea n = 361, 4.5%), peripheral edema (n = 231, 2.5%). Imatinib was associated with nausea/vomiting (n = 677, 4.4%), fatigue (n = 549, 3.6%), anemia (n = 404, 2.6%), abdominal pain (n = 400, 2.6%), and rash (n = 340, 2.2%), hemorrhage (317 AEs, 2.1%). Regorafenib was associated with fatigue (n = 104, 8.6%), palmar-plantar erythrodyesthesia syndrome (n = 66, 5.4%), diarrhea (n = 60, 4.9%). Ripretinib was associated with fatigue (n = 534, 8.4%), alopecia (n = 355, 5.6%), nausea/vomiting (n = 273, 4.3%). Sunitinib was associated with fatigue (n = 420, 6.1%%), nausea/vomiting (n = 284, 4.2%), diarrhea (n = 262, 3.8 %), hemorrhage (n = 149, 2.2%).Conclusions The FAERS database revealed multiorgan AEs associated with five GIST treatment medications. Novel findings include eye/facial and peripheral edema with avapritinib, palmar-plantar erythrodyesthesia syndrome, headache/migraine, and gait abnormalities across all five medications, pancytopenia with imatinib, and hemorrhage with imatinib and sunitinib.