Appropriateness of Otic Quinolone Use among Privately Insured US Patients.

Considering emerging safety concerns involving otic quinolones, we assessed the extent of otic quinolone use for questionable indications. Descriptive cross-sectional study of a national sample of privately insured patients. Outpatient encounters in the United States. Children and adults with outpatient pharmacy-dispensing claims for new prescriptions of otic or ophthalmic quinolones in 2017 were identified within the IBM MarketScan Commercial Claims & Encounters and the Medicare Supplemental Database. Each dispensing ≥30 days apart constituted a unique episode. Only claims with supporting ear-related diagnoses on outpatient encounters ±3 days of dispensing were considered. Ophthalmic drops were excluded if eye-related diagnoses were found ±30 days. Prescribing was classified as appropriate, questionable, or undetermined. We found 214,897 episodes in 200,270 patients. Adults were twice as likely as children to have otic treatment with questionable indications (6.2% vs 3.0%). Sensitivity analyses with broader time windows to ascertain diagnoses showed similar proportions of questionable use. Otalgia and cerumen impaction constituted 90% of questionable indications. Family physicians (6.8%) and internists (8.0%) had higher percentages of questionable use than other specialties. Based on the demonstrated risks of quinolone ear drops, opportunities exist to decrease otic quinolone use, especially in adults.