1 Relationship of Biological Influences on the Subjective States of Addicts.- 2 Opiate Receptors and Opioid Peptides: Are They Involved in Drug Addiction?.- 3 Applications of Human Behavioral Pharmacology to the Problems of Drug Addicts: A Brief Review.- 4 Conditioned Taste Aversions and the Regulation of Drug-Taking Behavior.- 5 Behavior in Excess: An Examination of the Volitional Disorders.- 6 Maintenance of Behavior by "Schedules": An Unfamiliar Contribution to Maintenance of Abuses.- 7 Some Endocrine and Immunological Observations in Heroin and Methadone Maintained Opioid Addicts.- 8 Multiple Opiate Receptors.- 9 Behavioral Factors in Drug Dependence and Withdrawal: A Discussion.- 10 Epidemiology of the Current Heroin Crisis.- 11 Empirical Patterns of Heroin Consumption Among Selected Street Heroin Users.- 12 Social Stress and Drug Abuse.- 13 Psychiatric Disorders in Treated Opiate Addicts.- 14 Psychiatric Disorders in Treated Addicts: Discussion.- 15 Naltrexone: Current Clinical Investigations.- 16 Clinical Pharmacology and Therapeutic Use of the Narcotic Antagonist: Naltrexone.- 17 Detoxification from Methadone Maintenance: Current and Innovative Approaches.- 18 Clonidine and Lofexidine: New Nonopiate Treatments for Opiate Withdrawal.- 19 The Swedish Methadone Maintenance Program.- 20 The Odyssey House Treatment Method.- 21 Research Design, Drug Use, and Deaths: Cross Study Comparisons.