Accuracy: No test is infallible. Surveys of drug testing labs have found remarkably high error rates from poor quality control. While good labs have added safeguards to minimize the risk of “false positives,” even if error rates are only one in 10,000, the extension of drug testing to tens of millions of workers as proposed by the government means that many workers will be falsely accused of drug abuse.
DON’T RELY ON EXCUSES: Although urine tests are far from infallible, it is difficult to challenge positive test results. “False positives,” in which workers are wrongfully accused of marijuana use, are highly unlikely so long as labs exercise proper care (however, not all labs do this). The standard procedure is to first screen the samples with an immunoassay test (e.g., EMIT® or RIA®), then confirm positive results with the more accurate gas chromatograph mass spectrometer (GCMS). This virtually eliminates the chance of false positives in exchange for a relatively high rate of “false negatives,” where drug use is not detected. The sensitivity of the test is determined by the concentration of metabolites it is set to detect: for the Dept. of Transportation, the standard cutoff is 50 nanograms/milliliter (ng/ml).
You can boost your fluid output by taking diuretics, which stimulate urination. Weak diuretics include coffee, cranberry juice, certain health food products and over-the-counter pills for pre-menstrual water retention.
BLOOD TESTS: In some situations, including accidents and roadside sobriety checks, blood tests may be used. Blood tests are a much better gauge of current impairment than urine tests because they detect the actual presence of THC in the system; however, they can be sensitive to other metabolites as well. Blood tests generally register positive for just a few hours after smoking, though heavy chronic smokers may be positive for a couple of days. Less sensitive are saliva tests, which register positive for about 2-4 hours after smoking. If you have used marijuana in the last few days but are not currently under the influence, you should insist on a blood (or saliva) test instead of a urine test if at all possible, since you are more likely to turn up clean. On the other hand, if you have smoked recently, you may do better to take a urine test, since this will at least leave open the question as to whether you were under the influence. Also, urine doesn’t turn positive until several minutes after smoking.
While you’re loading up on water before the test, you may also want to take a large dose (50-100 milligrams) of vitamin B-2, available in B-complex multivitamins. The purpose of this is to color your urine yellow, since otherwise you are likely to produce clear, watery urine, which makes some collectors suspicious (contrary to rumor, vitamin C won’t help). In rare instances, some labs will reject a sample for being too watery; in this case, however, they will typically give you a second chance. Wait until your test results have been confirmed before indulging in compromising behavior.
If you’re taking the test on very short notice, you may wish to resort to more potent diuretics, which are widely prescribed to treat high blood pressure. Although strong diuretics, such as furosemide (Lasix®), are available only on prescription in the U.S., they can be had over-the-counter in Mexico and other foreign countries. Beware that they can be dangerous for certain persons, such as diabetics or pregnant women, and can cause problems if taken over extended periods. Diuretics can be detected in urine, but are rarely checked except for athletes. The following regime has been suggested by a former army drug testing officer (Robert Freeman, “How to ‘Beat’ a Drug Test,” High Times, Aug. 1988): Take an 80-milligram dose of Lasix; take a hefty drink of water; piss two or three times, then take the test. If you’re lucky and didn’t smoke too much pot, a good washout may get you past a test on a couple days’ notice. However, regular smokers should allow at least a week or two if at all possible.
No substance is known to produce a false positive for marijuana. It used to be that ibuprofen (Advil, Motrin, Nuprin) interfered with the marijuana test, but this problem has been fixed. A variety of over-the-counter medicines can cause false positives for amphetamine and other illicit drugs on the EMIT test, but not on the GCMS.
We are sorry having to mention these devious techniques, but feel it is necessary to defend innocent people against wrongful accusations of drug abuse. California NORML urges you to use this information responsibly and not as a way of hiding irresponsible marijuana use.
WHAT’S WRONG WITH DRUG URINE TESTING?
Privacy: Urine tests intrude on intimate bodily privacy. Mass drug screening violates the privacy of the majority of responsible employees in order to spot a minority of alleged drug abusers, many of whom are in fact not drug abusers at all. Government-imposed drug testing may be restricted by the 4th Amendment to the Constitution, which forbids unreasonable search and seizure and requires “probable cause” for search warrants. However, the 4th Amendment does not generally apply to tests by private employers.
NORML – Working to Reform Marijuana Laws Dealing With Urinalysis on Short Notice While NORML strongly opposes drug use on the job, we think no one should be forced to submit to urine testing,
The best way to pass any drug test is to not consume at all. Having said that, don’t worry if it’s “too late.” There are ways to mask THC in your system, so do your best to follow our tips below – and think about a backup plan in case you might need the extra help.
THC is fat soluble and as a result, it gets stored in your fatty lipid tissue. Because of this, your fat cells will secrete THC metabolites into your bloodstream at a constant rate. As a result, many different cleansing techniques are ineffective, as your fat cells will continue to release THC metabolites into your system over time.
Instead, here are three ways to pass a drug test:
It makes sense that the healthier you are, the better off you’ll be (in all aspects in life). When it comes to THC and its metabolites, they have less of a chance of storing themselves in your body fat, if there isn’t a lot of body fat in the first place! Having said this, everyone has varying metabolisms that break down THC at different rates. Although exercise can potentially push THC back into your blood stream at a faster rate, this doesn’t mean that you should throw away healthy habits into the wind. Simply maintain a healthy lifestyle and don’t work out too much before a test.
If you’re on a tight time frame, then you probably just received notice about a marijuana drug test and need answers now. Thankfully, there are many detoxification products available (which we cover below) to help your body rid itself of harmful toxins in approximately a week. They’re successful by leveraging herbal supplements to cleanse your body. Be sure to use a home drug test kit after to ensure you’re fully clean of THC.
- The amount of THC and its metabolites in your system
- The type of test you’ll be required to take
- The testing levels for your drug screen
With this number in mind, most people can assume their body will be clean of THC metabolites within 3-4 weeks — more or less depending on frequency, body weight and amount consumed.
If you’re truly panicking a day or two before your test, it might be worth your while to try a same day cleanser from a company like TestClear.com (available online). Such products temporarily target the urinary tract to flush metabolites to give you a brief period for which to give a clean urine sample, meaning you could technically pass a drug test in 24 hours.
As we mentioned, piss tests are more common than a hair drug test. To pass a marijuana urine test, also known as a urinalysis test, you don’t need to be 100% free of THC metabolites. Rather, you need to have levels below the threshold for the test. Typically the threshold is 50 ng/mL, which is higher than you may think. As long as you register under this value, your test result will be negative.
Whether you’re applying for a new job or trying to hold on to the one you’ve got, passing a marijuana drug test can be an important step. Here are several tips on how to clean THC out of your system, starting with a weed detox.