For odontogenic infections in adults without allergies, which drug is considered first-line?

Study for the Manor Preboards Module 2 Test. Use flashcards and multiple choice questions that include hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

For odontogenic infections in adults without allergies, which drug is considered first-line?

Explanation:
Choosing an antibiotic for odontogenic infections hinges on coverage of the mixed oral flora, including both aerobes and anaerobes, plus good penetration into bone and soft tissues. Amoxicillin fits this requirement well in adults with no penicillin allergy. It effectively targets the common oral pathogens, is well absorbed with reliable tissue levels, and is convenient and safe, making it the preferred first-line option. Other drugs in the list don’t match as well: an agent like azithromycin has limited activity against the anaerobes typically involved in dental infections; metronidazole alone misses the aerobic streptococci; and cephalexin covers some bacteria but has weaker anaerobic coverage relevant to odontogenic infections. This makes amoxicillin the most balanced and reliable initial choice.

Choosing an antibiotic for odontogenic infections hinges on coverage of the mixed oral flora, including both aerobes and anaerobes, plus good penetration into bone and soft tissues. Amoxicillin fits this requirement well in adults with no penicillin allergy. It effectively targets the common oral pathogens, is well absorbed with reliable tissue levels, and is convenient and safe, making it the preferred first-line option.

Other drugs in the list don’t match as well: an agent like azithromycin has limited activity against the anaerobes typically involved in dental infections; metronidazole alone misses the aerobic streptococci; and cephalexin covers some bacteria but has weaker anaerobic coverage relevant to odontogenic infections. This makes amoxicillin the most balanced and reliable initial choice.

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