The Division on Addictions at Cambridge Health Alliance, an affiliate of Harvard Medical School, has created a series of self-change toolkits designed to help people gain information and help for addiction-related problems.

Harvard professor of neurobiology Steven E. Hyman addresses the neurochemical mechanisms that result in the loss of free will when a person becomes addicted to drugs.

A long-term study of male health professionals suggests that responsible, moderate drinking may benefit people with high blood pressure.

Addictive behaviors represent confusing and complex patterns of human activity, including drug and alcohol abuse, some eating disorders, compulsive or pathological gambling, excessive sexual behaviors, and other intemperate behavior patterns which have defied explanation throughout history. This essay attempts to clarify the nature of addiction and provide an introduction to the field of addictive behaviors.

A brief and introductory description of drugs and their effects: Opiates and Opioids; Sedative-Hypnotics; Stimulants; Hallucinogens; Marijuana or Cannabis; Inhalants. Drug effects are not simple to understand. Every drug's biochemical effect interacts with a person's psychological expectations for using the drug and the social setting within which the use occurs.