Dennis McKenna: The Chemistry Behind the Coca Leaf

Coca leaf use and “coca vs cocaine” get unpacked through ethnopharmacology, focusing on what is actually in the leaf and how it works in the body. Dennis McKenna frames coca as a plant chemistry story, distinguishing the three main domesticated coca species and emphasizing that the leaf contains multiple alkaloids beyond cocaine. He explains how whole-plant use differs from isolated cocaine and highlights pharmacology shaped by plant symbiosis and an “entourage effect.” The episode also covers traditional chewing context, including how alkaline activation changes absorption. It discusses whether coca chewing may support transition away from cocaine dependence and notes that prohibition has limited the scientific questions researchers could pursue, leaving many issues understudied. It positions the conversation as part two of a coca series, bridging biology, history of stigma, and what prohibition does in real communities.