The present invention relates to the field of prevention and treatment of diseases involving NMDA receptors of the central nervous system. It relates more specifically to compounds of 1-(indol-3-yl)-3-hydroxy-3-(2-oxo-2-ethyl)-indol-2-ones type, as a drug, and the use of such compounds in the preparation of pharmaceutical compositions. These pharmaceutical compositions may in particular be intended to prevent or treat diseases involving NMDA receptors of the central nervous system, in particular severe/resistant epilepsy and cognitive disorders resulting therefrom, especially autism, but also strokes, schizophrenia, degenerative diseases involving the activation of NMDA receptors, such as Parkinson's disease and Alzheimer's disease, Rett syndrome, or amyotrophic lateral sclerosis, migraine, dementia and major depressive disorder.