The invention relates to a pharmaceutical composition comprising oil isolated from Silybum marianum seed as active substance as well as pharmaceutical vehicles and/or excipients. The invention also relates to preparation of oil isolated from Silybum marianum seed.L'invention concerne une composition pharmaceutique comprenant de l'huile isolée à partir de graine de chardon-Marie en tant que substance active ainsi que des véhicules et/ou des excipients pharmaceutiques. L'invention concerne également la préparation d'huile isolée à partir de graine de chardon-Marie.