1. A study has been made of 75 patients admitted to the New York Hospital—Westchester Division between January 1, 1930, and January 1, 1950, for the treatment of drug addiction.2. The primary drug of addiction was morphine in 34, barbiturates in 24, and other drugs such as heroin, dilaudid, codeine, and demerol in 17 cases.3. A statistical review of hereditary and environmental factors is presented.4. Methods of hospital management have been discussed.5. A plan for a standardized psychological survey has been presented.6. Follow-up studies revealed that 15 have remained abstinent following hospitalization for 1 to 14 years and that, as a result of the treatment, 12 more are managing better, indicating that about 36% seem to have been benefited.