Tetracyclines · Pharmacology

Which tetracycline is specifically used off-label to treat the Syndrome of Inappropriate Antidiuretic Hormone (SIADH) because it inhibits the action of ADH?

  1. Minocycline
  2. Tigecycline
  3. Demeclocycline
  4. Oxytetracycline
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Correct answer: Demeclocycline

Demeclocycline induces a state of nephrogenic diabetes insipidus by interfering with the intracellular signaling of ADH in the renal collecting duct. This property makes it useful for managing hyponatremia in SIADH patients.

Difficulty: Medium Question 6 of 20

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