to subdue? They did not use any numbing that normal dentists use because it was a surgery that they put me under for. I only had IV sedative in my hand and no needles in my mouth as far as I can remember. Is this numbness one of the uncommon side effects or is it something common that happens to everyone? and when can i expect it to leave? i am going camping tomorrow and i am hoping it will be gone by than because it affects my ability to talk and swallow.