What is the difference between proper use, misuse drug and abuse drug?

proper use is for medical purposes.  Drug misuse refers to the use of a substance for a purpose that is not consistent with legal or medical guidelines, most often with prescription medications.  If regular use results in one of the following, then an individual likely may have a substance abuse problem.

Health complications as a result of substance abuse

Inability to carry out daily responsibilities

Physical dependence

Withdrawal symptoms if usage stops

“Cravings” for drug or alcohol

pathogens is the answer