Hi mjb, welcome...You definitely need to find out what is causing these mouth sores. It would be very hard to say if it's one of your medications or something else, but in any case please see your physician as soon as you can. I would also check all of your meds at www.drugs.com and see if any of these would cause something like this.
In any case, whether it's a medication reaction or something else, see your physician so it can be evaluated and treated.
Good luck... and I hope you get a quick resolution.
Important:
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.