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Information sobre el Embarazo Drug dependence means that a
person needs a drug to function normally. Abruptly stopping the
drug leads to withdrawal symptoms. Drug addiction is the
compulsive use of a substance, despite its negative or dangerous
effects. A person may have a physical dependence on a substance
without having an addiction. For example, certain blood pressure
medications do not cause addiction but they can cause physical
dependence. Other drugs, such as cocaine, cause addiction
without leading to physical dependence. Tolerance to a drug
(needing a higher dose to attain the same effect) is usually
part of addiction. Drug addiction; Addic