Which medications in the drug class Tetracyclines are used in the treatment of Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH)?

Updated: Aug 16, 2019
  • Author: Christie P Thomas, MBBS, FRCP, FASN, FAHA; Chief Editor: Vecihi Batuman, MD, FASN  more...
  • Print


Demeclocycline is an older tetracycline. One of its adverse effects is nephrogenic diabetes insipidus and polyuria, which can correct the excess of water seen in SIADH. It is no longer available in most countries and may be nephrotoxic in patients with liver failure.


Demeclocycline is a tetracycline derivative that induces diabetes insipidus by impairing the generation and action of cAMP, thus interfering with the action of AVP on the collecting duct. The drug's onset of action may be delayed by over a week; thus, it is not indicated for the emergency management of symptomatic hyponatremia.

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!