Dentist Questions Mouth ulcers

Can antibiotics cause mouth ulcers?

I have been on antibiotics for a viral infection, but now I have mouth ulcers? Can antibiotics cause me to have mouth ulcers, or could it be from something else?

2 Answers

Antibiotics will not cause mouth ulcers.
Viruses do not respond to antibiotics, only bacteria. If the ulcer is a virus (cold sore), an antibiotic will not help.