The dexamethasone suppression test in mania.

The results of the overnight 2 mg Dexamethasone Suppression Test administered to 50 manic patients are reported. Twenty-three (46%) cases showed an absence of normal suppression, results which are similar to those seen in endogenous depression and which differ to those of others who have all reported normal suppression in mania. Suppressors and non-suppressors were not shown to differ in the factors of age, weight, polarity or the rated severity of mood.