Imipramine hydrochloride (N-(γ-dimethylaminopropyl)-iminodibenzyl hydrochloride, “Tofranil”) has been shown by many investigators to be of value in the treatment of depressive states. The reports of Kuhn (1957, 1958) and of Kielholz and Battegay (1958) have been followed by confirmatory papers from other authors. A number of contributors to the McGill University Symposium on Depression and Allied States (1959) commented favourably on the value of imipramine in depression; Hoff, however, while agreeing that the drug is useful in acute depressions stated that he found it ineffective in chronic depression.