fybogel

I have had IBS since I was 18 and always suffer with D but since I started this eating plan the constipation is so so bad. (well at least its not cramping like It used to)

I have tried everything eating more fiber as in all bran, brown rice, brown pasta loads of veg. I even went to a herbalist and bought fiber tablets which didn't do much so its got that bad I was taking lactalose daily so went to doctors and was given fybogel this is my 3rd day but the pain is unbelievable last night it felt like I was in labour and all day today the cramps and the rope around the stomach feeling is back.

question is has anyone else gone through this, is it normal until it gets in my system?