A multicenter, randomized, double-blind, placebo parallel controlled clinical trial on the efficacy and safety of Lianhua Qingwen granules in the treatment of acute pharyngitis

INTERVENTION: placebo group:Lianhua Qingwen Granule Simulator;test group:Lianhua Qingwen Granules; CONDITION: Acute pharyngitis PRIMARY OUTCOME: Median time of disappearance of pharyngeal pain; SECONDARY OUTCOME: Change rate of total symptom score from baseline on days 3 and 6;Change rate of pharyngeal pain score from baseline on days 3 and 6;Difference in the disappearance time of pharyngeal pain between two groups;The disappearance rate of pharyngeal pain on the 3rd and 6th days; INCLUSION CRITERIA: 1) Conforming to the diagnosis of acute pharyngitis in Western medicine; 2) Age range from 18 to 65 years old (including boundary values at both ends), regardless of gender; 3) Before enrollment, the researcher evaluated the pharyngeal pain VAS score to be = 4; 4) Patients with a course of disease = 48 hours (defined here as patients who experience symptoms and signs of acute pharyngitis such as sore throat and swollen throat within 48 hours of this visit); 5) Volunteer to participate in clinical trials and sign an informed consent form.