The discovery and development of stromectol represent a paradigmatic example of drug repurposing, wherein a medication originally intended for one indication demonstrates unexpected therapeutic benefits in another. The serendipitous discovery of ivermectin's antiparasitic properties transformed the landscape of parasitology and public health, ushering in an era of unprecedented progress in the control and elimination of neglected tropical diseases. This success story underscores the importance of serendipity, scientific curiosity, and interdisciplinary collaboration in drug discovery and development.