My doc used to prescribe that powder as well (but now they have it in pill form as an FYI). He told me it’s fine to put it in things like apple sauce and stuff. I usually defer to what he suggests. He did say that you have to be careful taking it close to when you take other medications, however, as it doesn’t absorb as well if you do that.
i take it in pill form, in addition to loperamide and it helps a lot. Best of luck!