New medical technologies in cough therapy: results of a double-blind randomized placebo-controlled multicenter clinical trial

Aim. To study the efficacy and safety of Eladis® in comparison with placebo in patients with non-productive cough.

Materials and methods. A phase III clinical trial enrolled 250 patients aged 18–65 years with acute respiratory viral infection with upper respiratory tract involvement or acute bronchitis. Patients were randomized into 2 groups of 125 subjects: group 1 received Eladis® (40 mg tablets), group 2 received a matching placebo. The patients received the study drugs 1 tablet BID for 7–14 days. After the treatment, patients were followed up (day 7±2) to assess the effect of therapy on the frequency of coughing attacks, the frequency and severity of daytime and nocturnal cough, the severity of cough, the duration of clinical cough cure, and the effect on the severity of the main acute respiratory viral infection symptoms.

Results and conclusion. The results of the study demonstrate the overall efficacy and statistically significant superiority of Eladis® over placebo: there were significant differences between the study groups in the proportion of patients who decreased the coughing attack frequency by ≥50% by day 5 (p<0.0001). In addition, the clinical cure of cough in the Eladis® group occurred 2 days earlier: the median time was 6 days, vs 8 days in placebo group. There was a decrease in the frequency of cough attacks and a decrease in its severity by more than 3.5 points by day 5 of treatment. All the effects were associated with high safety of the drug.