Drug addiction is a major health problem in modern society. It is characterized by the failure to resist one's impulses to obtain and take certain types of addictive drugs despite serious negative consequences (Volkow and Li, 2004). Chronic addictive drug use is often related to abnormal functional organization in the brain, which leads to habitually hypersensitivity to the drug and drug-related cues and ensures their compulsive patterns of drug-seeking behavior (Kalivas and Volkow, 2005).
