Otolaryngologic Side Effects After COVID-19 Vaccination

Objectives: With widespread vaccination against COVID-19, concerns regarding side effects have been raised. We aim to assess the frequency of otolaryngologic adverse events (AEs) following COVID-19 vaccination as compared with other vaccines in a national database. Study Design: Retrospective analysis of national registry. Methods: The Food and Drug Administration's Vaccine Adverse Event Reporting System (VAERS) database was queried from December 2020 to May 2021 for all COVID-19 vaccination AEs. Complaints were categorized as otolaryngologic and sub stratified into different anatomic components. Reporting odds ratios (ROR) and proportional reporting ratios (PRR) were determined for AEs of clinical significance. Results: The total number of AEs reported from vaccination with the Moderna, Pfizer-BioNTech, and Janssen vaccines equaled 1,280,950. Of these, 62,660 (4.9%) were otolaryngologic in nature, with 32.6% associated with the oropharynx/larynx, 18.3% with the nasal cavity/sinuses, 17.1% with the ears/vestibular system, 10.0% with the oral cavity, and 21.9% miscellaneous. Signal ratios reached significance levels for dysgeusia (n = 2124, PRR: 17.33, ROR: 16.36), ageusia (n = 1376, PRR: 2.81, ROR: 2.81), anosmia (n = 983, PRR: 4.01, ROR: 4.01), rhinorrhea (n = 2203, PRR: 2.99, ROR: 3.00), throat tightness (n = 3666, PRR: 4.99, ROR: 5.00), throat irritation (n = 3313, PRR: 4.51, ROR: 4.52), dysphagia (n = 2538, PRR: 2.07, ROR: 2.07), tinnitus (n = 4377, PRR: 3.97, ROR: 3.98), and vertigo (n = 2887, PRR: 3.93, ROR: 3.93). Signal ratios were not significant for facial paralysis, Bell's palsy, anaphylaxis, sinusitis, hearing disability, and ear pain. Conclusions: Although several otolaryngologic symptoms were reported, few were found to be clinically significant. Of note, facial paralysis, Bell's palsy, and anaphylaxis did not meet signal thresholds to be determined significant. Level of Evidence: 4 Laryngoscope, 134:1163–1168, 2024.