"A condition in which an individual feels a compulsive need to continue taking a drug. In the process, the drug assumes an increasingly central hold in the individual's life" ( Levinthal
An addiction to drugs, or the inability to stop using harmful substances despite the harmful problems they cause.
A condition that happens when a person feels that he/she needs drugs in order to function better. A person can be physically dependent, meaning that his/her body intensely desires the drug. A drug user can be mentally dependent too. This means that the user craves the drug in his/her mind. Drug users become dependent before becoming addicted to drugs.