Summary: | Abstract Acute tonsillitis tends to recur. In cases where patients do not meet the Paradise criteria, the possibilities of non-surgical treatment are more often considered. The objective of this study was to evaluate the therapeutic efficacy during the long-term follow-up and the effect on the recurrence of the phytoneering extract BNO 1030 (Imupret®) in patients with acute non-bacterial tonsillitis. Methods In this Randomized, Open-Label, Multicentre, Comparative Study, 238 outpatients aged 6–18 years were randomized to receive either BNO 1030 (Imupret®) for 4 weeks in addition to standard symptomatic treatment, or to receive standard treatment. Evaluation criteria: reduction in the symptom severity less than 1 point, the number of tonsillitis recurrences at each control point after 3, 6 and 12 months during the one-year follow-up. Results A significant reduction in the severity of local symptoms and the general condition at each control point within the year of follow-up and a significant decrease (by 66.56%) in the recurrence rate of tonsillitis were noted. The anti-recurrent action was manifested during within the year of follow-up. All patients tolerated phytotherapy well; no adverse reactions were noted. Conclusions BNO 1030 (Imupret®) is a safe and effective medicinal product for acute non-bacterial tonsillitis in children aged 6–18 years. In addition to the main symptomatic treatment, it leads to a significant reduction in the clinical manifestations and the number of recurrences of tonsillitis within the year of follow-up. Trial registration This trial was registered in German Clinical Trials Register retrospectively on June 27, 2018. Trial Acronym: ATi-1 DRKS-ID: DRKS00015020
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