What antibiotics are first line for post op tooth extractions?

• A. Amoxicillin, clavamox
• B. Azithromycin
• C. Clindamycin
• D. Doxycycline

Answer: (A)

The main idea here is choosing an antibiotic that reliably covers the bacteria commonly found in the mouth after a tooth extraction. Amoxicillin works well because it targets the typical oral flora, including streptococci and anaerobic bacteria, and it has good bioavailability for soft tissues and bone. Using amoxicillin with clavulanate (amoxicillin-clavulanate, Clavamox) broadens this coverage to include beta-lactamase–producing organisms, which are more likely in mixed odontogenic infections or when the infection is moderate to severe. That broader spectrum makes it the preferred first-line option in many post-extraction scenarios.

Azithromycin is an alternative if penicillin cannot be used, but it doesn’t reliably cover many anaerobes involved in odontogenic infections. Clindamycin can treat these infections and is used in penicillin-allergic patients, but it carries a higher risk of causing C. difficile and can be less ideal for bone penetration in some cases. Doxycycline isn’t considered the first-line choice for acute dental infections due to concerns about efficacy and patient tolerance in initial management.

So, amoxicillin, particularly with clavulanate for broader anaerobic coverage, is the best first-line choice for post-operative tooth extraction infections.