I thought I did a great job with the colonoscopy prep but evidently I wasn't cleaned out enough even though I drank all of the prep and had clear liquid coming out at the end before I had the colonoscopy. The colonoscopy was painful which was a first for me as all of my previous ones were easy and I chose to go with the minimum anesthesia for the procedure and was a mistake in retrospect. They had to reposition me multiple times during the procedure if I remember correctly and each time was painful for me and difficult for them 🙃

I found the senna tea recommendation from another member in one of the constipation discussions and it worked for me but I use it as a last resort if I haven't had a movement in a few days - https://www.amazon.com/China-Slim-Extra-Strength-Women/dp/B003BL2IMI/. The Miralax was always hit and miss and didn't always work the next day then my PCP suggested taking a senna tablet in the morning and the Miralax in the evening. Her reasoning was that the senna helps the stomach muscles contracting and the Miralax brings the water into the stomach to add more liquid. This worked for awhile but it took more than the one senna tablet she suggested and I usually ended up taking 3 to 4 of them - https://www.amazon.com/dp/B0CMVZVW3T. The directions on the bottle say not to take more than 4 a day and not to use them for more than a week unless directed by a doctor. It also has some side effects listed that it's good to discuss with your doctor.

Bottom line for me which may or may not be the same for you, the senna tea always worked the morning of the next day when I drank it late afternoon or evening. I have learned not to let it steep too long (only a few minutes). The more it's steeped the stronger and greater laxative effect. The tablets are better at helping me keep the bowel movements regular. I'm still trying to use the Miralax but it doesn't always work for me. It used to work great and was all that I needed. I've never been diagnosed with IBS/IBD but I'm guessing it might be part of the problem.

Another thing I've been using but have found it difficult to get the correct amount in my system is Heather's Tummy Fiber. I also really find the fennel tea and peppermint tea help with the gas and bloating. https://www.helpforibs.com/footer/treatments.asp