Neuroendocrine dysfunction and response to tricyclic antidepressants.

Patients with DSM-III unipolar major depression (N = 26) were treated with tricyclic antidepressants after 2 weeks of inpatient drug-free observation and neuroendocrine testing. Medication was prescribed with individualized dosages and was monitored with blood levels. Treatment response (greater than or equal to 50% decrease in Hamilton depression score after 4 weeks) was seen in 6 of 13 patients given desipramine and 7 of 13 given nortriptyline. Of the 13 nonresponders, 9 accepted treatment with another drug and/or ECT; 5 responded. Thus, 18 of the 26 patients responded to treatment. Abnormal pretreatment DST was correlated with increased responsiveness to treatment, although all patients had a high probability of response.