Tysabri is a disease-modifying drug that slows the progression of multiple sclerosis. Another benefit of Tysabri is that it reduces the frequency of MS flares, making this an ideal treatment for people who suffer from relapsing forms of MS. Unlike other MS drugs, Tysabri works by blocking white blood cells from the brain.
Patients who don't get results with other disease-modifying medications often have better results with Tysabri. A common complaint about this medication is it tends to start wearing off after a few weeks, leaving patients feeling their symptoms more accutely during the week before their next injections. Regardless, Tysabri is shown to reduce lesions, pain and fatigue.