The mission of medical pharmacology in the CHU (University Medical Centres) is to contribute, through research, instruction and treatment, to the development and optimal utilization of drugs. With a progressive development, medical pharmacology is now present in all CHUs, where its responsibilities are both hospital-related and university-related. This progressive development also explains why medical pharmacologists, regardless of their initial training, are recognized as drug experts. Continued growth of the discipline, in the context of changes in the hospital and university environment, should reinforce its position in the evaluation and proper use of drugs.