Yes-the roof of my mouth, and my tongue. Plus, my tongue always felt like it had been "burnt" (like after drinking hot soup). I have mentioned the possibility of drug induced lupus before. Painless mouth sores was one of the things my rheumatologist told me to watch for. If you have any testing done, get your c components checked, along with a test for lupus. Don't freak about it though. If it is drug induced lupus it will subside eventually.