Miriam, it's not supposed to dissolve.

If you think it may help you, try taking it in the pill variety called Colestid.
Sarah, if you have IBS it may be just the thing for you. It is a stand alone treatment for IBS but only if you have the diarrhea type IBS. It's not recommended at all if constipation or alternating diarrhea/constipation is your problem as it can be constipating.
My husband takes it for IBS-D only and it completely stops it. It's a lifesaver for him.