How long does an antibiotic take to alleviate pain on a tooth infection?

Part of the answer: An antibiotic is only part of the solution. If a tooth is abscessed the underlying problem needs to be treated by either having a root canal or extraction.

Complicated: There is no exact answer to your question. It depends upon the location and size of the infection, which specific bacteria are involved, the cause of the infection, your medical conditions, the specific antibiotic, dose and route of administration, etc. It may take 12 hours to a couple of days to start being clinically effective. What really is the most important factor is the elimination of t.