Since the introduction of anti-depressant drugs into general use in the psychiatric field, there have been several statements to the effect that such a drug administered concurrently with electrical treatment reduces the number of shocks required to achieve a satisfactory response. This has been claimed by Sargant (1961) but without experimental support. Dunlop (1960) has published a comparison between the number of electrical treatments given with the anti-depressant drug during a particular attack, and the number of treatments without the aid of a drug in an earlier attack in the same patient: however, comparison of treatments in the same group of patients at different times is unreliable because there may be other factors to account for the differences noted. A controlled trial is necessary to ensure that all factors are constant other than the one under consideration.