I am a pharmacist, so I have tried everything mentioned. Miralax has just never ever worked for me, even pre op. Dulcolax does the trick, but it is not a good idea to take a laxative like that all the time. I haven't tried any fiber supplements post op, but I Did during my first pregnancy and it was not pleasant.....tons of bloating. I think I will try fiber again. It's sort of funny I have this issue because I have spent many years on advising people on how to relieve constipation. I took a probiotic for 30'days straight several months back, I didn't notice any improvements in my digestive health either..lol.