The invention provides 11-β-hydroxysteroid dehydrogenase type 1 enzyme (11βHSD1) inhibitors, such as a compound of the formula: (A), its hydroxy and keto metabolites, and pharmaceutically acceptable salts thereof, for treating cognitive disorders, including age-related cognitive disorders, such as Alzheimers Disease. Also provided are methods and uses for inhibiting 11βHSD1 and for reducing the concentration or preventing the elevation of concentration of cortisol in the brain of a subject by administering the compound of the formula (A) its hydroxy and keto metabolites, and pharmaceutically acceptable salts thereof.
