Mongolian Medical College of Inner Mongolia University for Nationalities

To evaluate the safety and efficacy of Helen Capsule in treating the overall outcome of patients in the early recovery stage of stroke (ischemic stroke, blood stasis obstruction) by placebo control, explore the dosage, and recommend the dosage for Phase III clinical trial.

Main purpose: Using the disease recovery rate after the end of medication as an evaluation index, to evaluate the effectiveness of Qingyan Lihou Capsule compared with placebo in the treatment of acute pharyngitis (lung and stomach heat syndrome). Secondary purpose: (1) Using the rate of disappearance of pharyngitis, time of disappearance of pharyngitis, VAS score, disappearance rate of single symptom of TCM syndrome, TCM syndrome score and pharyngeal signs as evaluation indicators, to evaluate the effectiveness of Qingyan Lihou Capsule compared with placebo in the treatment of acute pharyngitis (lung and stomach heat syndrome). (2) To evaluate the safety of Qingyan Lihou Capsule compared with placebo in the treatment of acute pharyngitis (lung and stomach heat syndrome).

Using placebo as control, preliminarily evaluate the efficacy and safety of Qingyan Lihou Capsule in the treatment of acute pharyngitis (lung and stomach heat syndrome), and explore the optimal safe and effective dose