This is a completed Phase 4 clinical trial focused on evaluating the efficacy and safety of CANIUM Tab. (DSP2505). The study was conducted in patients suffering from acute bronchitis. Various treatment interventions were used within the study, including the drug DSP2505 (Canium) itself, as well as the drug Umckamin. Additionally, placebos matching Umckamin and DSP2505 (Canium) were used, indicating the comparative nature of the study. Among the sponsors of the study were Dasan Pharmaceutical Co., Ltd. and several university hospitals, such as Konkuk University Hospital and Dong-A University Hospital. The aim was to determine how effectively and safely CANIUM acts in this patient group. The study has already been completed.