How long does marijuana stay in your system?

Question by : How long does marijuana stay in your system?
Ok I had some weed about a week ago and I’m getting a blood test in 2 days and I’m just wondering if they can find out that I’ve been smoking marijuana because I don’t want my parents to find out. And if they can find out that I have been smoking marijuana from a blood test,is there a way to get it out of my system within 2 days time. Thanks.

Best answer:

Answer by Brian
3 to 90 days depending on the amount you ingested/ smoked. if your a regular smoker for weed it will be toward the 90 day period

What do you think? Answer below!


  1. I think the minimum is 30 days…your f’d

  2. According to the website of Columbia University’s Health Services:

    Marijuana itself does not “stay” in your system, but the main chemical in marijuana, THC, does. It fact, it may stay in your system forever because it is stored in fatty tissues of various organs.

    Despite being stored in body fat, THC is only detectable for a certain amount of time. Many drug tests, including urine tests, look for 9-carboxy-THC which is the by-product of your body metabolizing the THC in your fat.

    Marijuana Detection Times

    Frequent users blood drug test (defined as someone who smokes several times per week)
    THC: 4-8 hours after smoking
    THC by-product: 2 or more weeks after smoking

    Frequent users urine drug test
    THC by-product: 2 weeks to a month after smoking (3 months for extremely heavy users)

    Infrequent users blood drug test
    THC: 3-4 hours after smoking
    THC by-product: 2-3 days after smoking

    Infrequent users urine drug test
    THC by-product: up to 10 days after smoking

  3. The speed at which marijuana leaves your body depends both on the speed of your metabolism, as well as on the half life of THC. It’s estimated that THC can have a half life that ranges anywhere from 1-10 days. It’s almost impossible to find out what that half life is, which means that it is very difficult to use it to calculate how long it will take for all of the THC to leave your body.

  4. forever, you tried it, now stop it! This is an ILLEGAL drug still, and it will follow you forever, drug bust, criminal record.

  5. Take some blood cleansing pills if you can’t get them then just drink plenty of water a chill exercise a little bit if you have time but all and all you should be ok 1 time smoking is nothing continuous smoking and and your F+++++.

  6. I’ve known people who have passed drug tests after having smoked just a few days prior. Drink lots of water to help flush the THC out of your system. It’s not a foolproof system, just a tip to help speed up the process.

  7. Haha…people like to lecture on here…it’s pot not crack. Anyways, it’s stored in fat and can stay six months. The blood test won’t see it unless it’s specifically screening for it. They don’t just randomly search for drugs in your blood. I assume, since drug test are generally done by urine or hair, that this isn’t a drug test and your fine.

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