Final answer:
Addiction is the condition in which a person loses control over their drug use, despite negative consequences. It involves both physical and psychological dependence.
Step-by-step explanation:
The condition in which a person can no longer control their drug use is called Addiction. Addiction is characterized by a compulsive and uncontrollable urge to engage in drug-seeking and drug-taking behavior, despite the negative consequences that may arise.
For example, a person with an addiction to heroin may continue to use the drug even when it affects their relationships, job, and overall health.
Both physical dependence and psychological dependence can contribute to addiction, but addiction goes beyond mere dependence. It involves a persistent behavioral pattern that is difficult to overcome without proper treatment and support.
Learn more about Addiction