What is this product?
Tysabri is a type of disease modifying drug used in the treatment of certain forms of multiple sclerosis (MS). This medication works by preventing leukocytes from crossing the blood-brain barrier into the nervous system where they may exacerbate MS lesions. Tysabri is provided in concentrate form (300mg in 15 ml) for infusion.
What is it made of?
The ingredients in Tysabri include natalizumab (300mg), sodium chloride, sodium phosphate, polysorbate 80, and water for injections. The active ingredient, natalizumab, is a humanized antibody capable of selectively binding to the α4-subunit of human integrins, a component found on all leukocytes.