Hi there, I have just been newsly diagnosed with crohns. My gastro has put me on pentasa sachets 3 times daily and protium 40 as I was finding the pentasa v hard on my stomach. I am taking them just over 2 weeks now but have awful like muscles pains in my back and my chest. Say when I stand up its like when my heart beats it pains etc. I have been to the doc this morn and they did an ecg as well and all is fine. She is going to talk to the gastro and phone me back later. Just wondering if anyone experienced this as a side effect etc?