Traditional medicine represents a culturally accepted link between past and present in Mexico. Pre-Hispanic cultures developed an original and powerful way of classifying knowledge. Research has individualized Pre-Hispanic Mexican medicine, bringing understanding of its classification systems, and recognition of the validity of aspects never included in Western thought. During its long history, traditional medicine was repeatedly outlawed and its practices prohibited. However, Mexican traditional medicine has survived, despite these measures, the political tendency to give modern scientific medicine an absolute priority, and the scientists' tendency to minimize traditional knowledge .