This document summarizes the development of Lagundi cough syrup from herbal folklore in the Philippines to a modern medicine. It describes how the National Integrated Research Program on Medicinal Plants (NIRPROMP) isolated Lagundi as a natural source for an effective herbal medicine in 1995. NIRPROMP then developed Lagundi into both a cough tablet and syrup formulation. The intellectual property for Lagundi is owned by the Department of Science and Technology, who licensed it to pharmaceutical companies. Lagundi cough medicine became widely successful due to marketing and advertising campaigns by licensees like Pascual Laboratories.