How long do drugs stay detectable in a drug test?

The duration for which drugs remain detectable in a drug test can vary depending on several factors, such as the type of drug, the individual's metabolism, and the testing method used. Generally, though, drugs can be detected for different periods of time in different samples. For instance, in urine tests, marijuana can be detected for up to 30 days, while cocaine may be detectable for 2-4 days. In blood tests, drugs like amphetamines can be detected for 1-2 days, but opiates may be detectable for up to 2-3 days. Saliva tests typically have a shorter detection window, with drugs like marijuana being detectable for 24-72 hours. Hair tests have the longest detection period, spanning several months to years. It's important to note that these time frames are approximate and can vary depending on individual factors.