The most commonly reported side effects of belzutifan include anaemia, hypoxia, and fatigue, based on 1,144 FDA adverse event reports from 2021 to 2025.
Percentages show how often each reaction appears relative to total reports for belzutifan.
These are voluntary reports and do not establish that belzutifan caused these reactions.
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Other drugs that appear in adverse event reports alongside belzutifan. Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.
Also suspected
Taken alongside
Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.
37.2% of belzutifan adverse event reports involve female patients and 57.7% involve male patients. The largest age group is adult at 58%. These figures reflect who reports side effects, not underlying risk.
Sex
Age group
Conditions and purposes for which patients were taking belzutifan when the adverse event was reported.
Showing 15 of 65 indications
Belzutifan is sold under the brand name Welireg.
An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.
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