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Systematic (IUPAC) name
CAS number 5697-56-3
ATC code A02BX01
PubChem 636403
DrugBank EXPT00848
Chemical data
Formula C34H50O7 
Mol. mass 570.765 g/mol
Pharmacokinetic data
Bioavailability  ?
Metabolism  ?
Half life  ?
Excretion  ?
Therapeutic considerations
Pregnancy cat.


Legal status
Routes  ?

Carbenoxolone, a synthetic derivative of glycyrrhizinic acid, is a licensed drug (in the UK) for oesophageal ulceration and inflammation. Other uses include treatment of oral and perioral lesions.

Additional recommended knowledge

Carbenoxolone (aka Carbenoxylone, CBX) is also finding increasing use as a Connexon (a hemichannel made up of 6 connexin subunits) blocker and as a gap junction (2 connexons join together) blocker.

Nootropic effects

Carbenoxolone has also been investigated for nootropic effects.[1]

This research started from an observation that long-term exposure to glucocorticoids may have negative effects on cognition. Carbenoxolone may decrease the amount of active glucocortocoid in the brain, because the drug inhibits 11Beta-hydroxysteroid dehydrogenase type 1, an enzyme which activates cortisol from cortisone, a glucocorticoid. In the research trial investigating this use of carbenoloxone, it was shown that the drug improved verbal fluency in elderly healthy men (aged 55-75). In type 2 diabetics aged 52-70, the drug improved verbal memory. However, it should be noted that potassium-sparing diuretic amiloride was co-administered with carbenoxolone, since carbenoxolone used by itself may cause hypertension by increasing cortisol in the kidneys.


  1. ^ Sandeep TC, Yau JL, MacLullich AM, et al (2004). "11Beta-hydroxysteroid dehydrogenase inhibition improves cognitive function in healthy elderly men and type 2 diabetics". Proc. Natl. Acad. Sci. U.S.A. 101 (17): 6734–9. doi:10.1073/pnas.0306996101. PMID 15071189.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Carbenoxolone". A list of authors is available in Wikipedia.
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