Blood Drug Testing

Drug Test?

Ok we have drug test at school and when they give you the cup they ask if you have had any over the counter drugs in the past 72 hours or anything like that. So does that mean that the drug test only picks up what you have done in the past 3 days? So if i smoked weed a week before the drug test it wouldnt show up?

Public Comments

1. Weed will stay in your system for up to a month depending on how much you smoke. Why would your school drug test you? I've never heard of that. Sounds like your human rights are being violated.
2. THC (marijuana) stays in your system for 14 days or longer. Many other narcotics are only in your system for hours. Over the counter medications can cause false positives but only stay in your system for a day or two. Poppy seeds can cause false positive opiate results. Sorry to say but you may turn up positive. One thing in your favor would be if you were really hydrated. This would dilute out the THC. Good luck!!
3. The reason they ask you about any over the counter drugs you have taken in the past 72 hours is to see if you will have any false positives for recreational drugs. Every drug has its own time period that it is detectable for, most drugs are 2 to 4 days, marijuana can be up to 30 days but that is only with heavy use. If you smoked weed only once a week before, then you will most likely pass the test. If you were a habitual smoker for the past month before that though, then you run a good chance of failing it, if so get a system cleaner. If you are a smaller person with a high metabolism it will get out of your system a lot faster. If you are really worried I would recommend you start exercising and drinking a lot of water and tea until you have to take the test. School tests are known to be very cheap and inaccurate though and I knew someone who had to take tests at school and was a drug user, and would simply dilute their urine with 90% water from the bathroom sink and the school never noticed the tampering because they used a cheap enough test.