In the treatment of the patient with congestive failure, the experience of recent years has firmly established the fact that it is the major if not the first order of business to put to work an effective system of diuretic medication. The recognition of this fact has altered the therapeutic approach and results in the management of these patients. In a study published from our clinics a few years ago,1it was shown that with the daily mercurial as the nucleus of the regimen for the routine treatment of congestive failure, approximately 90%, instead of the usual 50 to 60%, of hospital patients may be discharged free of congestive failure in an average of about a week, in place of about three or four weeks. One of the points of emphasis in the current planning for this group is that of adequate maintenance with the continued use of potent