If you have been prescribed antibiotics by your dentist or oral surgeon for a “bad tooth,” it most likely means that you have an infection that must be addressed fairly quickly. Many people believe that by taking antibiotics, the discomfort will subside and that they are free and clear of any further trouble with the tooth. This is not necessarily the case. Many oral infections, stemming from broken, abscessed or deeply decayed teeth, can linger for extended duration of time. Antibiotics may help the symptoms subside a bit, but they are not curing the root of the problem.