The objective of the present study was to estimate the effectiveness of the herbal preparation tonsilgon N exhibiting the anti-inflammatory and immunostimulating properties for the treatment of the children presenting with pathology of a pharyngeal tonsil. A total of 62 children at the age varying from 3 to 11 years with chronic adenoiditis (CA) were available for the examination. The study group was comprised of 32 children, the control one included 30 patients. The study has demonstrated the improvement of daytime nasal breathing in the study group compared with the control patients by 15% on day 5, by 30% on day 7, and by 73% on day 9 after the onset of the treatment. The intensity of rhinorrhea in the children treated with the herbal preparation decreased sooner than in the control group. Nasal breathing at night improved as soon as day 5 after the onset of therapy. However, the difference between the treated and control children was statistically significant only on day 7 whereas night-time nasal breathing on day 9 improved in the study group by 1.4 times compared with the control one. It is concluded that the inclusion of therapy with tonsilgon N in the combined treatment of the children presenting with chronic adenoiditis increases its effectiveness and accelerates the process of reconvalescence. Tonsilgon N is a safe medication suitable for the prolonged application.