A Clinical Trial to Evaluate the Efficacy and Safety of HL301 Versus Placebo in Acute Bronchitis Patients

Exclusion Criteria

• •1. Patients with respiratory and systemic infections requiring systemic antibiotic therapy
• •2. Patients with bleeding tendency
• •3. Patients who investigators determines to severe respiratory disease that would interfere with study assessment
• •4. Patients who were treated with oral systemic adrenocortical hormone or immunosuppressive drug within 4 weeks prior to Visit 2
• •5. Patients who were treated with oral antihistamines, ACE suppressive. or systemic/inhalative glucocorticosteroid within 2 weeks prior to Visit 2