Herbycin is a natural cough remedy syrup prepared from fresh, healthy, and clean Oregano leaves, a medicinal plant known for its expectorant and antibacterial properties. It is clinically proven to relieve cough associated with acute and chronic disorders of the upper respiratory tract such as bronchitis and asthma by reducing mucus viscosity. 

Reference: IPI. (2022c, November 25). Herbycin - International Pharmaceuticals Inc. International Pharmaceuticals Inc. https://ipi.ph/products/health-wellness/herbycin/