The invention relates to a pharmaceutical composition in the form of an oral suspension including diosmin and xanthan gum. The invention further relates to the use of the pharmaceutical composition according to the invention for the treatment of venous insufficiency.Composition pharmaceutique sous la forme d'une suspension orale comprenant de la diosmine et de la gomme xanthane. Utilisation de la composition pharmaceutique selon l'invention dans le traitement de l'insuffisance veineuse.