Listeriosis is a disease caused by infection with the bacterium Listeria monocytogenes, and it is most often contracted after eating contaminated foods or liquids. Listeriosis most commonly affects newborns, the elderly, pregnant women, and those individuals with a poorly functioning immune system (immunocompromised).
I have been on Plaquenil and can tell you my diarrhea started within days of starting the med. My doctor warned me that diarrhea and weight loss were side effects. I said, Well, I am usually very constipated and could stand to lose 10 pounds so this could be a good thing.. haha.
Some of the possible side effects associated with amoxicillin treatment include nausea, vomiting, stomach pain, vaginal itching or discharge, headache, swollen, black or hairy tongue or thrush (white patches inside the mouth and throat). Antibiotics, such as amoxicillin, can cause diarrhea. This could be a side effect of the medication or it could indicate a new infection. If you experience diarrhea that is watery, or has blood in it, contact your doctor immediately and do not take any medication to stop the diarrhea unless otherwise instructed.