(Abst.) Smoking associated w/increased disease activity during Tysabri treatment in MS on: August 03, 2018, 09:29:58 pm #1 From PubMed (August 3, 2018) a Danish study showing that persons with MS taking natalizumab who smoked 20 cigarettes a day had an increased MS relapse rate. The abstract title is "Smoking is associated with increased disease activity during natalizumab treatment in multiple sclerosis": Smoking is associated with increased disease activity during natalizumab treatment in multiple sclerosis - PubMed Smoking intensity was significantly associated with the number of relapses during natalizumab treatment. 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.