I recall muscle weakness in the legs, a confused feeling, dizziness, stomach discomfort, and nausea when I first started taking it. There might of been back pain but you can get that from almost anything. All of those symptoms DID GO AWAY within a day or so. I still have a little nausea but its gone with 30 min or so. Try eating something small or even drinking something if you feel nauseated and that might help you. It does me. Even if I drink ice tea it helps. I mean its no big deal anyways but it reduces the nausea. To put up with 30 min of nausea but to be fine the rest of the day and to have regular or more regular bowel movements is a INCREDIBLE!! I also noticed my gas significantly reduced along with bloating. A huge difference.
I think a lot of people do not take Amitiza correctly. They either take it on an empty stomach or with virtually no food. For most, you have to take it with food. Fortunate for me, my doctor told me to be prepared to be nauseated for about 3 days and it should get better. He was right.
Amitiza is a great drug.
Let me know how your doing.
I haven't noticed any back pain from Amitizia. When I have back pain, it's from me overdoing things and just getting a back ache (heating pad and Aleve work just fine!) As for just feeling bad, I can't say I've had that either as a result of Amitizia. Amitizia can work TOO WELL at times and I do end up with D instead of C. I am learning to know when to take it and when to back off for a day. Of course, with IBS, who can say what is causing us problems? Is it the disease or the drug? That's one thing I dislike the most about IBS, its unpredictability. I always know where the bathrooms are!