I've been on Betaseron since a year after I was diagnosed in 2000. On August 20th, I quit taking Betaseron cold turkey when I finally received my new oral medication Tecfidera. For the last few days I have been dealing with horrible body aches, diarrhea, cold sweats & the inability to eat (not feeling sick, just not being hungry or interested in eating). I do not have a fever, a cough, allergies or anything else I can conclude to be at fault for these annoying symptoms.