Concurrent administration of tetracyclines is most likely to impair the action of_____________?
Correct answer: D. Penicillin
- A. Lincomycin
- B. Chloramphenicol
- C. Erythromycin
- D. Penicillin
Explanation
Tetracyclines are bacteriostatic, whereas penicillins work best against actively multiplying bacteria, so the combination may antagonize penicillin’s bactericidal action. This is why tetracyclines can impair the action of penicillin more than the other listed drugs.
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