The homeopathic remedy my old naturopathic doctor always gave any of us for diarrhea was Bryonia. I would call him, tell him I thought I had food poisoning, he would muscle test over the phone, say take Bryonia and hang up. He wasn't too concerned because it always worked. In acute situations, you can take a homeopathic every 5 minutes until things calm down, then cut back to three times a day and stop when you're feeling normal. Doesn't matter what is causing the diarrhea.