The Department of Defense drug testing program is primarily based upon random urine tests.

Urine tests prove past usage. The tests cannot prove impairment, frequency of usage, method of ingestion, or knowing ingestion.

Drug abuse is incompatible with military service.

Unlike alcohol abuse, which the Department of Defense (DoD) views as a preventable and treatable disease, the DoD deals with drug abuse more strictly, in that the identified drug abuser is subject to punitive action or involuntary separation.