Constipation and fiber intake

Around 3 months ago, I started to develop constipation. I used to suffer from diarrhea 7+ or sometimes even more bms/day that would necessitate I go to the hospital to take fluids That used to happen for years until I began Remicade 4 and a half years ago. Then, bms did not exceed 3 bms/day. This late development of constipation is not familiar for me esp. when I'm on Remicade. I brought it to my doctor's attention two months ago and informed him that I might go for more than 5 days or more w/o a single bm. He added trimebutine 200 mg 1x3 and things went on well. A month later, things started to slow down again. So, he added mosapride to gastreg and I resumed having bms every two or 3 days. However, I started to have severe dizziness and didn't know the cause. I thought that the new med was mosapride so it could be the culprit and it turned it out to be. I stopped taking it and now I'm constipated again. Actually, I lost track of when it was the last time I had a bm. I feel I have fecal impaction, btw, I had it several years ago and know how it feels. I'm suspecting the grapes I started lately to eat. I eat them w/o skin or seeds but could too much fiber cause this constipation?
I took before bedtime agiolax granules and am keeping my fingers crossed that they do not cause any problems.

Hi Ambling
After 13 years of having Crohn's, this is the first year that I add fibers to my food. All these years, I only allowed myself to eat low-residue fibers in addition to potatoes and bananas. I can't figure out what suddenly changed my bowel movement habits to constipation. Don't want to push my GI to order some sort of scan or scope. I'm not ready yet to undergo such a procedure during the outbreak of COVID-19. I was scheduled for a fistula MRI last month but cancelled the appointment.

I have alternate of constipation and diarrhea. I can have no BM for 4 straight days, and the 5th day I have running diarrhea, then followed by constipation again in the ensuing days. I find eating some fruit can help change from constipation to diarrhea. For example, if I eat orange or grapefruit, then I will have loose BM. Everyone is different. You can try different food or fruit to see what helps. If I have no go for 3 days, I become worried. If I go 4 times a day, I would also be worried. So I adjust my food accordingly.

Saw my GI and he prescribed Prucalopride 1 mg before bedtime. It was only one tablet that I took. On the following day, although I had a bm, I started vomiting and then a flare up ensued. That was around 10 days ago. Ever since I've been having this flare up. I stopped taking it.

73monte, thank you. Well, it seems something was wrong with the last infusion. I had a delayed infusion reaction 5 days post infusion and my Crohn's is not well. The next dose is due in 2 weeks. I'll have the antibodies test prior to it but it seems as my GI warned me if the delayed infusion reaction recurs this time, we will have to reconsider another biologic other than Remicade.

I had problems going to the bathroom 5x a day and then not going for days. My doctor suggested I start taking Citrucel everyday and Miralax every other day. I have taken Metamucil before and it didn't really do much for me, so I was a skeptical. So far, this has been amazing for me. Citrucel is a bulk-forming laxative but it says it is for constipation and regularity, so it helped me for both. The Miralax just makes sure everything comes out at once. Also this is probably just me, but I found the Citrucel powder mixed in water worked better for me than taking the pills. It doesn't taste bad either.