RT Journal A1 Mann J, Aarons S, Wilner PJ, et al T1 A controlled study of the antidepressant efficacy and side effects of ( — )-deprenyl: A selective monoamine oxidase inhibitor JF Archives of General Psychiatry JO Archives of General Psychiatry YR 1989 FD January 1 VO 46 IS 1 SP 45 OP 50 DO 10.1001/archpsyc.1989.01810010047007 UL http://dx.doi.org/10.1001/archpsyc.1989.01810010047007 AB • Monoamine oxidase (MAO) inhibitors are effective antidepressants whose use is limited because of unwanted side effects and the possibility of a tyramine-induced hypertensive crisis (cheese reaction). ( - )-Deprenyl (the official nonproprietary name for this substance is selegiline), a selective MAO type B inhibitor, may be safer and have fewer side effects, but its antidepressant efficacy is uncertain. A double-blind placebo-controlled study was carried out in depressed outpatients who were treated with ( - )-deprenyl in an MAO type B selective dose range and at a higher nonselective dose range. (-)-Deprenyl did not have a statistically significant antidepressant effect after three weeks of treatment at doses of 10 mg/d. However, after six weeks and at higher doses (averaging about 30 mg/d for the second three weeks), ( - )-deprenyl was superior to placebo in antidepressant effect with a positive response rate of 50% vs 13.6% and with a 41% reduction in the Hamilton Depression Rating Scale mean score vs 10% in the placebo-treated group. No hypertensive crises were seen. The rate of occurrence of side effects with (-)-deprenyl was no greater than with placebo. It was concluded that (-)-deprenyl is an effective antidepressant in a dose range where it is distinguished by the absence of many of the side effects typical of nonselective MAO inhibitors.