Owing to the small number of cases treated so far, no firm conclusions can be drawn. The drug when administered intravenously produces sleep very rapidly which lasts for a few minutes only, thus necessitating frequent injections or recourse to an intravenous drip. The quantity required at one time varies from 100 to 160 c. c. In uncooperative cases when it is difficult to administer the drug, it can be injected after giving an ECT. Phlebitis appears to be a common complication and was met with in 5 cases. Further controlled trials are indicated.