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Has anyone taken this Medication? I took my first dose Last Friday and had a horrible reaction of severe flushing, high BP and HR I was sent to ER from work. Any advice or similar reactions? Update: I have been completely stopped on the Tecfidera. I will be switching neurologists due to mine moving facilities but they great thing is my new neurologist specializes in Multiple sclerosis I will have new imaging at the end of the month and start Kesimpta soon!