Carola is the director of the Dos Emociones (Two Emotions) project and of the Spanish Observatory of Medicinal Cannabis, two pioneering organisations in Spain fighting for the regulation of medicinal cannabis and for the improvement of the quality of healthcare. Behind these two ambitious projects, which are currently spearheading a renewed movement for the regulation of therapeutic cannabis, is Carola’s personal story. The story of a struggle and of personal achievement which, in the purest style of the “butterfly effect”, triggered these two projects. Carola has been able to transform an unfortunate accident and all the suffering it has caused into two initiatives that are now actively contributing towards improving the lives of many patients. We wanted to interview her to learn about how it all started, when and how the flutter of the butterfly’s wings that would cause an earthquake years later came to be.