Allodynia (skin tenderness) associated with semaglutide: A case series

Abstract Disclaimer In an effort to expedite the publication of articles, AJHP is posting manuscripts online as soon as possible after acceptance. Accepted manuscripts have been peer-reviewed and copyedited, but are posted online before technical formatting and author proofing. These manuscripts are not the final version of record and will be replaced with the final article (formatted per AJHP style and proofed by the authors) at a later time. Purpose The glucagon-like peptide-1 receptor agonist (GLP-1RA) class of medications are widely prescribed for management of diabetes mellitus as well as obesity or weight management. Although there have been rare reports of skin hypersensitivity associated with GLP-1RA medications, no published reports have documented allodynia or skin pain to the touch. Summary We report 4 cases of allodynia associated with dose escalation of the GLP-1RA medication semaglutide. Each patient was prescribed semaglutide for management of obesity and developed symptoms of allodynia with the 2.4-mg subcutaneous once-weekly dose. Therapy was stopped in 2 patients, both of whom had resolution of symptoms. Two patients opted to continue semaglutide despite the adverse effect, with one experiencing resolution after 4 months. No pharmacological mechanism was identified for this unique adverse drug reaction. There was a clear temporal and dose-response relationship in each of the 4 cases. Conclusion The 4 cases presented had scores of 5 or 6 (probable) on the Naranjo scale. It is not known whether this is a class effect of the GLP-1RA medications or if the adverse effect will consistently resolve or improve with continuation.