(Abst.) Risk factors for reactivation of disease activity after stopping Tysabri on: December 22, 2019, 08:50:14 pm #1 From PubMed (December 22, 2019), "Risk factors for reactivation of clinical disease activity in multiple sclerosis after natalizumab cessation": Risk factors for reactivation of clinical disease activity in multiple sclerosis after natalizumab cessation - PubMed High disease activity and a high level of disability prior to NTZ treatment seem to predict disease reactivation after treatment cessation. When switching to subsequent DMDs, the washout time shoul... PubMed · ncbi.nlm.nih.gov Logged MS Speaks--online for 20 yearsSPMS, diagnosed 1980. Avonex 2001-2004. Copaxone 2007-2010. Glatopa (glatiramer acetate 40mg 3 times/week) 12/16/20 - 3/16/24.