The antibiotic of choice for infections of pulpal origin is:

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1. 

   oneguy

   The best guideline “for infections of pulpal origin” is to use an antibiotic with the narrowest spectrum applicable and lowest incidence of toxicity and side effects. Penicillin V Potassium (penicillin VK) remains the antibiotic of choice as it has a narrow spectrum of microbial activity that includes most of the bacteria associated with endodontic infections (both facultative and anaerobic) and because of its efficacy and low toxicity. To remind, if the in the Answers, there’s “no choice of penicillin V”, then choose “Amoxicillin” the next is “ Clindamycin”.

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