Eli5 How far back do drug tests check?

Question

I don’t know how to phrase the title, I’m sorry.
ANYWAYS, do drug tests check if you’ve EVER done drugs, or or in a specific amount of time? Or does it depend on anything else?

In: 8

Answer 1

Drug tests detect the presence of certain drugs in a person’s system, usually in the form of urine, saliva, or hair samples. The amount of time that a drug test can detect drugs depends on the type of drug and the type of test used. Generally, urine drug tests can detect drugs for up to 3 days after last use, while saliva tests can detect drugs for up to 24-48 hours after last use. Hair tests can detect drugs for up to 90 days after last use.