Pharmacology · single question

Amoxicillin is known to interact with all of the following drug categories EXCEPT:

  1. Analgesics (e.g., acetaminophen, ibuprofen)
  2. Anticoagulants (e.g., warfarin)
  3. Oral contraceptives
  4. Anti-diabetic drugs
Show answer and explanation

Correct answer: A. Analgesics (e.g., acetaminophen, ibuprofen)

Amoxicillin does not have a clinically significant interaction with routine analgesics such as acetaminophen or ibuprofen. However, amoxicillin does interact with anticoagulants (it can enhance the effect of warfarin by altering gut flora and vitamin K production, increasing bleeding risk), oral contraceptives (it may reduce their efficacy by disrupting enterohepatic circulation of estrogens), and certain anti-diabetic agents. Therefore, analgesics are the EXCEPTION.

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