See below. Medications which impact the inflammatory activity of the disease are often called "disease modifying therapies". These are medications for the long haul, to reduce the impact and frequency of relapses, and slow brain volume loss. Other classes of medications target symptoms due to MS (such as steroids) but do not alter the course of the disease itself.
MS. There is no known cure for multiple sclerosis at this time. However, there are therapies that may slow the disease. The goal of treatment is to control symptoms and help you maintain a normal quality of life. You need to find which medications are best and safest for you. Too many options to discuss here.