The Pharmacovigilance Unit (UFPV) of the Clinical Research Division of Gustave Roussy performs real-time assessment of the safety of the investigational medicinal products used in nearly 90 clinical trials sponsored by Gustave Roussy or by other academic sponsors, in particular, from the Ile-de-France region (within the framework of GIRCI*). Constant attention is paid to monitoring the safety of investigational medicinal products with regard to potential side effects in patients. This is called pharmacovigilance for clinical trials.