Yes, it can definately be the Canasa. I have the same problem as you. It was working for a while and then I just can't tolerate it anymore. I have the same issues with mesalamines as Judy. Call up your doc because I'm not sure what other options are available if it is the Canasa. Are you still on the foam?
And btw, Judy - I am so glad to hear someone else say that they can take Colazal with no problems but have issues with Asacol, Rowasa and Canasa. I was starting to feel like a freak because I'm the same way as you!
Left sided Uc -'92 - Colazal, Canasa, 6mp, Prilosec, Biotin, Forvia, Pro-Bio
Allergies - Singulair, Astelin(got the script - just haven't tried it yet!)
Secondary Reynauds Syndrome - '04 - Norvasc
Fibromyalgia - '06
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