What are the side effects of amoxicillin clavinuate potassium (penicillin)?

The runs. I'd say most common side effect of amox/clavulonate is loose stools. If severe, stop, if doesn't clear, call doctor. Allergy to this is generally a rash, could be throat swellling. Take afte food, all antibiotics can nauseate you or upset your stomach a bit.