I used to use Imodium only for years and then made the switch to Metamucil/psyllium husk. Both have their benefits but I'm sticking with Metamucil only. Experimenting with how my body responds was the only way I figured out a routine that works for me.
For a while I was using both Metamucil and then taking Imodium at night and would occasionally get a little "backed up" because I was too slowed down. Recently I had my bowel twist and required surgery and my doctor said that potentially taking imodium contributed to my bowel twist.
He said imodium thickens me up and my bowels are like a jump rope with one end being my j-pouch and the other end being the rest of my small bowel just swirling around freely in my abdomen and the imodium could have given my intestines a little too much momentum and caused my twist. Unfortunately we don't know for sure why the twist happened but thought I would share in case it helps someone out on here.
I take the recommended dose of Metamucil three times a day before my meals.