Clinical research is of great importance for both development of new pharmaceuticals and medical procedures as well as for ensuring and optimizing their practical use in medical routine

Phase I to III clinical trials are indispensable for development and approval of pharmaceuticals. They can prove efficacy and tolerance, which are necessary for the market approval.

Phase IV clinical trials are all trials conducted after the market launch, e.g. for further investigation of the efficacy and safety profiles (PASS, PAES).