Mapping the biology of drug-resistant MS on: November 10, 2016, 03:39:24 pm #1 Some people don't respond to the interferon-beta drugs but others do. Some researchers have been trying to find out why, and their findings are discussed inthis article, "Mapping the biology of drug-resistant multiple sclerosis" in Medical News Today, November 9, 2016. 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.