Drug abuse has been studied from various theoretical perspectives to understand why individuals begin using drugs and why some people develop substance dependence. These theories help researchers, health professionals, and policymakers design effective strategies for prevention of substance abuse. The explanations for drug abuse involve biological, psychological, and sociological factors that influence individual behavior and social environments. One of the important explanations is the biological theory. According to this perspective, drug abuse may occur due to genetic and neurochemical factors. Some individuals inherit a biological vulnerability that makes them more likely to develop dependence on substances such as alcohol, nicotine, or narcotic drugs. Genetic predisposition may influence how the brain responds to drugs, particularly through neurotransmitters like dopamine, which regulate pleasure and reward. When drugs stimulate these reward pathways, individuals experience feelings of euphoria and satisfaction. Repeated exposure may lead to tolerance and dependence, making individuals more likely to continue drug use. From a prevention perspective, understanding biological vulnerability helps in early identification of high-risk individuals and encourages preventive interventions such as counseling and health monitoring. Psychological theories also play an important role in explaining drug abuse. One widely known explanation is the psychoanalytic theory. According to this theory, drug abuse may be linked to unresolved conflicts, emotional distress, or personality problems developed during childhood. Individuals who experience anxiety, depression, low self-esteem, or trauma may use drugs as a way to escape psychological pain or to cope with stress. Substance use becomes a form of self-medication that temporarily relieves emotional suffering. Preventive strategies based on this theory emphasize mental health care, emotional support, counseling, and development of coping skills among vulnerable individuals. Another psychological explanation is the learning theory, which suggests that drug abuse is a learned behavior acquired through observation and experience. According to this perspective, individuals learn to use drugs through reinforcement and imitation. When drug use produces pleasurable feelings or reduces stress, it acts as a positive reinforcement, encouraging repeated behavior. Similarly, individuals may imitate drug-using behaviors observed among friends, family members, or media influences. If drug use is rewarded socially, such as gaining acceptance within a peer group, the behavior becomes stronger. Prevention