If you do and have to, say, take a drug test for a job, it may be helpful to know how long certain drugs stay in the places they’re most likely to check: your urine, blood, and hair follicles. But keep in mind that the drug’s metabolites could stick around longer than indicated. The timeline for you depends on your age, height, weight, amount of the drug used, how often you use them, your overall health, and even your state of hydration.
Some users might be surprised to hear heroine and alcohol are the closest in terms of physiological similarities. Both classified as 'depressant drugs,' heroine and alcohol occupy a person's urine for 3-5 days, blood for 10-12 hours, and hair: up to 90 days after the fact. Cocaine and MDMA are roughly identical, sticking around in the urine for 3-4 days, blood: 1-2 days, and hair follicles for up to 90 days.
Other dangerous and illegal substances, however, differ greatly in terms of tracing within the human body. LSD, commonly referred to as 'acid' or 'lucy,' is said to test positive in the urine for 1-3 days, blood: 2-3 hours, and for three days in hair follicles after a single dose. While similar in name, amphetamines and methamphetamines halt their likeness there.
Amphetamines, the lesser form within the same 'family' of the drug will occupy a person's urine for 1-3 days, blood: about 12 hours, and hair for a maximum of 90 days. Methamphetamines, on the other hand, stay in the system for far longer, testing positive for 3-6 days in urine, 24-36 hours via a blood draw, and up to 90 days in hair stands.