A person who compulsively uses a drug despite knowing it will cause harm is described as:

The term used to describe a person who compulsively uses a drug despite being aware of the harm it can cause is "addicted." Addiction encompasses not only the physical dependence on a substance but also the psychological compulsion to seek and use that substance despite negative consequences. An individual who is addicted often experiences a loss of control over their drug use and continues to engage in the behavior even when it leads to significant problems in various areas of their life, such as health, relationships, and work.

While terms like "abuser" and "dependent" might seem applicable, they do not capture the full extent of the compulsive nature of addiction. "Abuser" refers to someone who uses drugs in a manner that is harmful or dangerous, but it does not necessarily imply the compulsive aspect that is characteristic of addiction. "Dependent" may suggest a reliance on the substance, but it does not denote the compulsive use aspect, which is key to addiction. Tolerance, on the other hand, relates to the body's adaptation to the effects of a drug, resulting in needing increasingly larger doses to achieve the same effect, but it does not imply the compulsive behavior associated with addiction.

In summary, the term "addicted" accurately describes the condition