Hello,Thanks for using HCM.
Fibers are plant product not absorbed by our intestine, they absorb water and form bulk to soften the stool.
But the quantity to be taken differs from person to person, at the same time you need to drink lots of water so that softening becomes easy.
The main side effect of taking fiber is gas formation, which if does not pass causes trouble,in form of
colic, making the individual uncomfortable.
The remedy I use with my patients in my clinic is start with low dose,educating them about drinking plenty of water and the side effects, if at all they occur.
Do not get dishearten by what has happened to you, you can again try with a very small quantity, and if this happens again you can tell your doctor and ask for alternative source or medication.