Study of the use of PVP-I gargles and nasal drops before and after ENT examinations with a total of 6,692 patients, finding high usability and good tolerance for use.21 patients (0.76%) reported an itching sensation in the nose on the first day of use of 0.5% PVP-I nasal drops and discontinued its further use. However, none of the patients reported any serious side effects or allergic reaction to 0.5% PVP-I nasal drops and gargles.The 0.5% PVP-I gargles and nasal drops were used by healthcare workers about three to four times in a day for 5 months. None of them developed any COVID-19 symptoms.
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