My father had this kind of problem, the doctor gave him some medicine, I don't know what it was, nothing changed and he remembered a remedy from the old people (he was Polish) It's to take a small glass of vodka with pepper, you mix and you drink it in one go.Actually, I got diarrhea before I started antibiotics (Augmetin) and managed to get it under control more or less, but it started up again after starting with the antibiotics. I’m back on plain rice and I’ll give it a day or two before going to the doctor. I was actually losing weight because I wasn’t eating enough due to diarrhea. I started gaining again but my digestion is still bad.
He didn't have diarrhea anymore.
You never know, it might work for you, you don't risk much to try.