kasacol hd is mesalamine
which is an immunomodulator used in treatment of IBS, ulcerative colitis
etc to reduce the number of flare ups.
but keeping in mind abut ur Hashimoto's
I would feel that you would be suffering from Gluten
which could also manifest like this.
wheat and related products enhance this effect in GIT.
try avoiding wheat and it products and c the difference.
wait for the biopsy
either wag just understand u have an underlying autoimmune disorder.
Feel free to ask for further details but I too need more of ur bowel habits details to comment on this.