That's true. I've never had any mouth sores but my sister did.

Hey, I know we're not meant to give medical advice on here but it sounds like you are having an allergic reaction - you need to see a doctor asap, they will almost definitely take you off the medication. If you start having trouble breathing or swallowing please go to an emergency room.

I have taken sulfasalazine with little result

One of the ? My dr asks every time I see him is if I have any mouth sores but I never have they say there is a mouth wash they can prescribe for it if I get any

Thank you. I will contact my Dr first thing in the morning.