Is anyone on tecfidera? I am starting week 3, and without being crude 4 days ago started having excruciating tummy pain, and loose stools, whilst having this pain I feel extremely sick and feel like I’m going to pass out, the pain is horrendous. At first I thought it was something I had eaten as why wouldn’t you think this? But it’s still continuing, I have googled side effects and looks like it might be this. Worrying more as due back to work Thursday, and the pain is unbearable.