• The antidepressant efficacy of lithium carbonate was assessed in a double-blind trial in 23 hospitalized depressed patients. Unequivocal response was significantly more frequent in bipolar than in unipolar depressed patients. Lithium carbonate responders had a greater visual average-evoked response amplitude increase in response to increased stimulus intensity, termed "augmenting."
No correlation could be demonstrated between lithium carbonate efficacy and either erythrocyte catechol-O-methyl tramsferase activity, age of symptom onset, number of hospitalizations, or family history of affective disorders.
Miron Baron, Elliot S. Gershon, Victor Rudy, Wulff Z. Jonas, Monte Buchsbaum. Lithium Carbonate Response in DepressionPrediction by Unipolar/Bipolar Illness, Average-Evoked Response, Catechol-O-Methyl Transferase, and Family History. Arch Gen Psychiatry. 1975;32(9):1107–1111. doi:10.1001/archpsyc.1975.01760270039003