Question: is metamucil good for diarrhea?
Answer: Psyllium (Metamucil, Fybogel, generics) – One teaspoonful of psyllium twice daily is often recommended for constipation, so why use it for diarrhea? The answer is that it has a water-holding effect in the intestines that may help bulk up watery stool. Some doctors recommend it for the variable bowel habit of IBS.