Organotherapy is a technique that uses extracts derived from animal or human tissues to treat medical conditions. The practice of treating an organ with the same one derived from another creature, known as similia similibus, was familiar to the Ancient Greeks and Romans. Consuming brain tissue was considered a potential treatment for those of low intellect for instance.
In early 20th century France, it was use to support sporting performance, particularly in cycling, using preparations like Pancrinol.