
Monica,
Thank you for your question.
When infection does not improve, it does not necessarily mean that your dentist was negligent. Amoxicillin is a good choice for tooth infections, but sometimes it does not work.
Reasons Your Antibiotic Might Not Work for Your Tooth Infection
Antibiotic resistance can develop if you have a history of taking antibiotics or if a bacterial strain has developed resistance. According to the Center for Disease Control (CDC), each year about 2.8 million people experience antibiotic resistance.
- History of taking antibiotics – Some people have medical conditions that lead their doctor to prescribe antibiotics. But taking them for an extended period might increase your risk of getting a severe infection that does not respond to certain antibiotics. Also, taking antibiotics to treat viral infections for a cold or flu can increase your resistance to antibiotics.
 - Bacterial strain resistance – Bacterial strains mutate and adapt to changing environments, including environments with antibiotics. If the bacterial infection in your tooth is amoxicillin resistant, the condition will increase and thrive.
 
Jaw infections can become severe, so report the problem to your dentist and get a new prescription. If your dentist is not available for some reason, schedule an emergency appointment with a dentist you can trust.
Ryan Perry, DD, a Baton Rouge family dentist, sponsors this post.