<prompt> The treatment options for patients with RRMS relapsing-remitting multiple sclerosis are all except?Interferon-b laInterferon alphaGlatiramer acetateInterferon-b lb  <response>: Ans. is B. The drugs used for multiple sclerosis Drug Mechanism 1. Interferon-b la Interferon-b lb o Downregulates expression of MHC molecules on antigen presenting cells o Pro-inflammatory and regulatory cytokines o T-cell proliferation o Entry of inflammatory cells in CN S 2 Glatiramer o Suppressor T-cells o Displace MBP by binding to MHC molecules o Pro-inflammatory and regulatory cytokines 3, Natalizumab Monoclonal antibody against a4 subunit of a4b1 integrin on lymphocytes o Prevents lymphocytes from binding to endothelial cells, thus inhibits transfer across BBB and entry in CHS 