drug dependence

Drug dependence is a condition where a person develops a strong reliance on a substance, such as alcohol, prescription medications, or illegal drugs. This dependence can lead to compulsive use despite negative consequences, physical tolerance (needing more of the substance to feel effects), and withdrawal symptoms when not using it. It often develops from repeated use, where the brain's chemistry becomes altered, making it difficult to function without the drug. Dependence can affect a person's health, relationships, and daily life, often requiring professional help to overcome.