Morphine

Drugs are chemical substances that can change how your body and mind work. A drug test looks for signs of illegal drugs or certain prescription and/or over-the-counter (OTC) medicines that can be misused. The test is usually done with a sample of your urine (pee). Less commonly, drug testing uses a sample of your blood, saliva (spit), hair, sweat, fingernails, or breath.

Drug testing is used to find out whether you have been using or misusing one or more drugs or prescription/OTC medicines. It can't diagnose a drug use disorder (addiction).