Answer:
"Drug abuse" apllies to the deliberate misuse of drugs (chemicals and medicines that affect the human body).

- It can include over-usage or combination of legitimate substances to alter or increase their effect.

- It can also apply to using drugs or medicines for other than their intended, prescribed, or legal use.

- It also applies to the use of substances declared illegal by law.

First answer by Bulletsamach. Last edit by Dfoofnik. Contributor trust: 2560 [recommend contributor recommended]. Question popularity: 16 [recommend question].