Is there a drug test that can find substances that youve taken a week or a month ago too? In the past or the results will just be present substances?

When you take a drug test the results will be based on that weeks/days substances or the substances and traces of everything youve ever done?
What kind of drug tests do mnc do? How does the whole thing work?
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Most Helpful Guys

  • Most drug tests only detect drugs that are still in your system, and different drugs take different lengths of time to get out of your system. I'm fat and smoke weed all the time, and it took me 2 months until I could pass a drug test. Hair tests can tell them everything that was done while the hair was grown.

  • For pee and blood tests most opiate drugs or alcohol leaves your body in a day or two. Weed can stay in your system 25 to 30 days after depending how much you use. The bad news is they can take a hair sample and see what you have taken for 6 to 12 months.

    • Whaaat they can know everything just be hair?

    • Yes, it is an expensive test much more so than pee or blood so it's not done too often. Most places are happy with pee tests.

    • So the pee test only shows past weeks substances right?

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What Girls & Guys Said

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  • hair follicle tests do the last 6 months (least according to judge judy) XD

  • In Hair depending how long it is, some drugs eg Weed can be detected for months or even a year.

    Other drugs like roofies won't be detectable after a few hours.

  • All drug tests can detect what drugs you took

    • drugs you took yestrday and the drugs you took a year or months ago?

    • A month ago, yes. But not a year.

    • Yesterday would obviously show up.

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