People often use testing methods such as blood, urine, hair tests... to detect all types of addictive substances as well as addictive components that exist in the human body for a certain period of time.

Drugs or any addictive substances or stimulants when entering the body also form one of the components of the blood. Therefore, blood tests can detect addictive substances. With each different addictive substance, the different duration of existence in the blood will give blood test results with different accuracy rates.

Different drug components take different amounts of time to be absorbed and completely dissolved in the body. Therefore, different types of testing will give results with different accuracy rates.