Citrucel vs Metamucil both are fiber, whichever he likes best is the one to use. This one you swallow and it sops up water in our digestive tract. I suggested Metamucil caplets if he didn't want to drink whichever he uses in the smaller amount of water that we are to use. Stay with the Citrucel if he likes it best!
Loperamide/Imodium are the same and they are the same as Lomitol. These are anti diarrhea meds and are different than the above fibers. We don't mix these with foods but swallow with water. If someone just uses once a day it's usually before bed so they hopefully will not have to get up during the night. Use whichever he likes best.
Salad is more of what I call roughage than fiber and in my case goes straight through me literally, If in a restaurant I would be to the restroom before the dessert course, sorry if TMI. Veggies, depending on how well cooked are somewhat better. Oatmeal may or may not work for some in soping up water vs causing food to exit more quickly.There are 2 kinds of food fiber like Scott discusses.
I hope I've helped clarify better. Sorry about my first post. Some of us were taken back as our doctors never told us to open up or sqash or anti diarrhea medications.
I've had my pouch 3 years now and only use Loperamide as try to get everything I need from food otherwise. I used Metamucil a long time after take down.