Double-Blind Naltrexone in Kleptomania

Inclusion Criteria: 1. men and women age 21-75 2. current DSM-IV kleptomania. Exclusion Criteria: 1. unstable medical illness or clinically significant abnormalities on prestudy laboratory tests or physical examination 2. history of seizures 3. myocardial infarction within 6 months 4. current pregnancy or lactation, or inadequate contraception in women of childbearing potential 5. clinically significant suicidality 6. current or recent (past 3 months) DSM-IV substance abuse or dependence 7. illegal substance within 2 weeks of study initiation 8. initiation of psychotherapy or behavior therapy from a mental health professional for the treatment of kleptomania within 3 months prior to study baseline 9. initiation of a psychotropic medication within 2 months prior to study inclusion 10. previous treatment with naltrexone 11. treatment with investigational medication or depot neuroleptics within 3 months, with fluoxetine within 6 weeks, or with other psychotropics within 2 weeks prior to study baseline.