Our office is often called about cases involving public intoxication or driving while under the influence of drugs. We are usually asked how long the human body takes to “flush out” the drug, as the asker usually is aware that the amount of time varies by the type of drug. In other words, within what time would a hair follicle or urine test be meaningful if negative for the presence of certain substance? Click on the following link to find out.
https://www.greghillassociates.com/drug-tests-how-long-after-use-are-certain-drugs-detectable.html.