Pharmacology · single question

All of the following antibiotics are bactericidal EXCEPT one. Which is the EXCEPTION?

  1. Cephalexin
  2. Amoxicillin
  3. Penicillin
  4. Doxycycline
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Correct answer: D. Doxycycline

  • A. INCORRECT. Cephalexin (a cephalosporin) is bactericidal.
  • B. INCORRECT. Amoxicillin is bactericidal.
  • C. INCORRECT. Penicillin is bactericidal.
  • D. CORRECT. Doxycycline, a tetracycline, is bacteriostatic, not bactericidal.

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