What do i take or do for severe pain after cavity filling?

Advil (ibuprofen): Or tylenol (acetaminophen). If otc meds don't help, contact the dentist who did the filling for you. Need to figure out why it's causing pain. Routine fillings should not cause pain at all.

Call your dentist: "severe" pain is not usual following dental fillings unless. Otc pain medication like Ibuprofen should be adequate to relieve any discomfort following fillings. Cold sensitivity might sometimes occur at first but should gradually diminish. "severe" pain could simply be caused by a "high" spot on a filling that needs adjusting, or it might signal a deep filling that's affected the tooth nerve.