Multiple sclerosis is a chronic neurodegenerative disease whose initial phase is characterised by periods of projection and remission, the length and cause of which have not been fully medically recognised and defined to date. The disease progresses over time to a chronic phase, causing demyelination of the nerves of the central nervous system. In the first stage of the disease, when symptoms of a flare-up occur, glucocorticosteroid therapies are effective in alleviating them.