Efficacy and Safety of Glycerol Lidocaine Ear Drops in the Non-Antibiotic Treatment of Otitis Externa Symptoms—An Observational Study

Purpose: The aim of this study was to investigate the safety and efficacy, as well as relief of symptoms after regular use, of 0.5% lidocaine hydrochloride solution in anhydrous glycerol (Auridol) in the form of ear drops, in patients with symptoms of otitis externa (OE) in a real-world setting. Methods: This real-world pre–post study included 64 subjects aged 1 to 69 years with symptoms as follow: swelling, pain due to regular exposure to water or caused by frequent use of detergents, pain due to prolonged wearing of earphones, or earwax clogging the external auditory canal. In each subject, following an otoscopic examination and interview given by an ENT, the Auridol treatment was initiated. The product was administered as two drops into the affected ear up to three times daily in patients with symptoms of OE. During each visit, physical and functional symptom were evaluated. In addition, the efficacy of using the product was assessment using a VAS scale. At the end of the study, subjects rated the product according to a Likert scale. Results: A statistically significant reduction in perceived pain was observed at t = 30’ as well as t = 3 days after application. For physical symptoms assessed by an ENT, a statistically significant difference was observed between consecutive scores for two of the assessed parameters (redness and swelling.) The product was rated very highly by the subjects. Conclusions: The results suggest that a combination of anhydrous glycerol and 0.5% of lidocaine in the form of ear drops has a positive effect in the treatment of symptoms of OE.