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How To Pass A Urine Drug Test For Marijuana: 20 Facts And Myths

Tetrahydrocannabinol (THC) is the main psychoactive substance of marijuana. Urine test (or urinalysis) for THC is the most common type of drug test used to find out whether or not the person smoked marijuana lately. It is used for various purposes, for example in pre-employment testing, random testing at workplace, in colleges, drug rehab centers, prisons etc. There are two methods of urine test - immunoassay and gas chromatography – mass spectrometry (GC-MS). First one is used for initial screen and conducted using cheap drug testing strips covered by chemicals, which react with THC metabolites, while the second one is more complicated and expensive laboratory analysis used only for confirmation test in case of positive initial screening.

While reading online forums or speaking with your friends you can find out lots of methods to get tested negative for THC even in case you have been smoked weed during last few days before test, but not all of them are real. This popular subject matter has plenty of myths and urban legends that must be debunked to stop misinform people. We collected and explored the most popular ways to pass a urine drug test for weed to find out which of them really work and which ones are not worth using.

People have right to protect their privacy and keep medical history secret, but cheating drug test may be a criminal offense depending on place and purpose of testing, so it is strictly prohibited to use these methods in federally mandated, court ordered and other official drug tests.

  1. Synthetic urine
  2. Another person’s urine
  3. Drinking water
  4. Adding water to sample
  5. Adding adulterants
  6. Stop smoking
  7. Diuretics
  8. Detox drinks
  9. Goldenseal
  10. Vinegar
  11. Pickle juice
  12. Niacin
  13. Dietary fibers
  14. Zinc
  15. Aspirin
  16. Sports and energy drinks
  17. Drinking bleach or Drano
  18. Exercises
  19. Not the first urination of the day
  20. Claiming to be a passive user

1. Synthetic urine

FACT

Substituting your sample with synthetic urine is one of the most common and effective ways to pass a drug test. This is obviously the best option in case of unsupervised test and very risky, but still possible, if you are supervised during the procedure. In this case special appliances are used like bladder belt with Whizzinator or just rubber tube. Anyway, this method requires thorough preparation with preheating synthetic urine in microwave and keeping it close to human body temperature until testing procedure. You should also ensure that you buy quality product, which is simulates all properties of real urine and will not be revealed and rejected by lab.

synthetic urine

2. Another person’s urine

FACT

Using a urine sample from another person also works, but it has its own disadvantages. Unlike synthetic urine, the real one is unhygienic and poorly stored as decomposes if not frozen. You should also make certain that your donor is 100% free from drugs. Furthermore, asking another person to give his or her urine can be awkward and will violate your privacy in case you want to keep your actions secret. This method is free of charge, yet using fake urine is obviously more convenient way to substitute your specimen.

3. Drinking water

MYTH

This method is also known as dilution or flushing. Actually, it is an internal dilution and it does not work. First, it is not easy to do, since drinking excessive amounts of water is dangerous for your health. Water intoxication (hyperhydration) leads to electrolyte imbalance disease and brain function disturbance. In rare cases it can even lead to death. Second, even if you dilute your urine enough, it will have pale color and lower specific gravity and creatinine level. Drug testing labs always check samples for integrity and reject diluted ones. Interpretation of diluted samples varies depending upon organization and its drug testing policy - sometimes it is considered as a failed test, in other cases, you will be suspected of tampering and subjected to a more thorough screening or even prosecuted.

4. Adding water to sample

MYTH

This is an external dilution and it is useless. Most testing facilities collect samples in rooms without sinks. According to Federal guidelines there should not be any sources of water, or if it is a toilet, water in the tank must be tinted. Bluing agent usually used. And even if you will find clean water it must be warm to save the human body temperature of specimen, because too cold or too hot urine will be suspicious. Finally, as well as an internally diluted sample, it will never pass an integrity check and will be rejected by laboratory.

5. Adding adulterants

FACT

Adulterants are substances that are added to urine in order to mask or destroy drug metabolites in it to provide negative test result. There are dozens of adulterants used for THC test, but only few of them really work.

Papain is an enzyme present in papaya fruit. There are studies confirming that when added to urine sample it reduces the concentration of marijuana metabolites for up to 50%, works for both initial and confirmation screening and can not be detected by standard adulteration tests. Journal of Analytical Toxicology calls papain a “potential problem” for drug testing industry. Papain is widely used in meat tenderizers, which are available in any grocery store, also you can find it as crude powder and even as a chewable tablets. Meat tenderizers in some tests lead to increase of THC metabolites, so it is recommended to use latex papain by adding to urine sample as a dry powder in a proportion of 10mg/mL.

Iodine is another adulterant present in some water purification tablets able to eliminate drug metabolites. According to this study it immediately destroys morphine, but has less evident effect on Tetrahydrocannabinol, so its use for marijuana test does not guarantee success.

Other adulterants do not work!

Bleach, vinegar, ammonia, glutaraldehyde, soap, salt, lemon juice, Drano, Visine, Klear etc. No one of them is proven to hide or destroy THC metabolites while all of them are screened for by drug testing labs and easily detectable.

6. Stop smoking

FACT

If you have enough time to prepare for drug testing, the most reliable way to pass it, is to stop smoking weed. It is impossible to say exactly how long marijuana stays in your system, as it depends on lot of factors like your weight, metabolism, age, smoking habits and lifestyle. Generally, young people who doing sports and don’t have excessive weight get rid of toxins faster. Also, occasional users usually test negative just few days after smoking, while heavy users may show positive during weeks. It is recommended to determine your own detection time by quit smoking and testing yourself everyday with home test strip. Anyway, the longer you abstain from drugs, the better chances to pass test you have.

7. Diuretics

MYTH

Diuretics are substances that stimulate production and output of urine. Diuretics can be medications like Lasix or Midol, some fruits, vegetables and herbs, as well as drinks like beer, cranberry juice, tea, soda etc. They do not eliminate toxins, but only flush out your system and decrease the concentration of drug metabolites in urine. Actually, it is the same effect as drinking lot of water. The only difference is that diuretics will help you to speed up urinating process, but result will be the same - diluted and rejected sample, and consequently failed test or retest in the best case.

8. Detox drinks

FACT

Marijuana detox drinks are proven method to pass drug test by cleansing your system from THC. In fact, they are same diuretics, but they include very important supplements, which let you to avoid failing integrity test. B vitamins (usually it is B-2 and B-12) color your urine yellow to make it look natural and undiluted, creatine increases creatinine (which is actually its breakdown product) level in sample, dietary fiber redirects THC metabolites from bladder to colon and so on. Also detox drinks are full of other useful vitamins and herbs which improve your health. All these components can be purchased separately, but it is more convenient to buy them in a single drink. You should remember that using detoxification products requires accurate following the instruction and careful time management as effect may be temporal. You will pass the test if you do it right.

Herbal Clean Qcarbo Detox Drink

Herbal Clean QCarbo

This detox drink is made of more than 20 components including herbs, vitamins, minerals, dietary fibers and other natural substances. Its fast acting formula starts cleansing your body from toxins in just 1 hour. Herbal Clean QCarbo Plus With Booster for frequent smokers and people with excessive weight is also available.

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9. Goldenseal

MYTH

Rumors about Goldeseal’s ability to mask illegal drugs and provide false negative results are myth. This myth is based on the novel “Stringtown on the Pike”, written by American herbalist and pharmacist John Uri Lloyd in 1901. In real life there are no evidences of any influence of this herb on THC or other drug metabolites. Goldenseal extract in any form, pill or tea, is just usual diuretic and it has same effect as other diuretics. Furthermore, there are reports that labs now test samples for its presence and consider its using as attempt to cheat.

10. Vinegar

MYTH

Adding vinegar to urine as an adulterant was explained before, but there is also an opinion that drinking vinegar before test can either flush out system or mask drug traces. Both statements are myth. When mixed with stomach acid and gastric enzymes vinegar only changes the pH level of urine and causes diarrhea, but does not have any significant impact on marijuana metabolites. Drinking vinegar is definitely a bad idea not only because of its unpleasant taste, but because it just won’t help you to pass the drug test under any circumstances.

11. Pickle juice

MYTH

There is a statement you can find in internet that pickle juice contains acid, which cleanses urine and dissolves drug metabolites. That’s not true. The only acid pickle juice contains is a vinegar, which is actually an acetic acid, but vinegar as we know does not mask or eliminate drug traces, therefore does not help to pass drug test. Also, pickle juice contains salt, usually it is a sodium chloride, a common table salt. As is known, excessive salt consumption makes people thirsty, so drinking brine will cause drinking large amounts of water thus diluting your urine, what is not effective way to pass a drug test too.

12. Niacin

MYTH

Niacin is also known as nicotinic acid or vitamin B3. It is used as a dietary supplement to support natural metabolism and regulate blood pressure as well as other important bodily parameters and processes. It dilates blood vessels what causes flush effect, which started the rumors about its cleansing properties. In fact, there are no evidences of its impact on concentration of THC in urine. In addition, an overdose of niacin is dangerous, because leads to number of unpleasant side effects like dry skin, itching, fever, dehydration etc. Dehydration causes increased water consumption, which dilutes you urine sample. This could help to pass drug test before, but nowadays with the improved testing technologies dilution does not work.

13. Dietary fibers

FACT

Dietary fibers redirect THC metabolites from bladder to colon and help to pass urine test. But unfortunately, the effect of consuming fibers is insufficient in case it used as the only means and it may take weeks to get rid of toxins this way. For occasional smokers one week is usually enough for cleansing in natural way even without using special remedies, so starting a high fiber diet is obviously not worth the effort. Furthermore, eating a lot of fibers has unpleasant side effects such as changing bowel movement schedule and hence diarrhea or constipation, cramping, intestinal gases etc. In spite of this, dietary fibers are great additional remedies, which are widely used along with other means, for example as ingredients in detox drinks or extra supplements to comprehensive detox programs. Fibers are available as food additives and also in such products as beans, nuts, whole grains, brown rice, cereals, potato, oatmeal and vegetables. Pectin is also a good source of a dietary fiber.

14. Zinc

FACT

There is a study confirming that zinc really masks THC metabolites and reduces their detection in urine drug tests. Moreover, the result can be achieved by any of two ways: ingesting (in the form of dietary zinc supplement) and utilizing it as a sample adulterant (in the form of zinc sulfate). Despite this, using zinc in any form cannot be recommended as a way to pass a drug test, because new methods of detecting its presence in urine were developed lately. Not all labs utilize these new methods, yet there are chances of getting caught while trying to cheat, so if you want to do it, do at your own risk.

15. Aspirin

FACT

Aspirin really helps, but only with tests based on EMIT assay. This is the cheapest test in the form of strip, which is dipped into the sample, commonly used for initial screening. Studies confirm that Aspirin interferes with the Emit assay and decreases its signals helping to mask traces of drugs. However, its effect is not crucial, therefore aspirin is usually used as a supporting agent along with more efficient remedies to increase chances. It is recommended to take 4 tablets about 4-5 hours before test.

16. Sports and energy drinks

MYTH

Lots of people on internet forums claim they have passed drug test by means of Gatorade, Red Bull and other sports or energy drinks. In fact, these drinks do not include any components that are scientifically proven to mask or eliminate marijuana metabolites. Everything they supposed to do is to restore energy and replace various useful substances in human body. All evidences about successful passing test include drinking gallons of water along with these products, so this method is nothing more than a dilution, which needs additional actions for increasing B vitamins and creatinine levels to pass integrity test.

17. Drinking bleach or Drano

MYTH

It sounds weird, but sometimes on drug related websites you can find posts or comments from people who recommend drinking hazardous liquids like bleach or Drano in order to cleanse your body from traces of drugs. Please, NEVER do this!!! Not only neither these liquids no their particular ingredients do not interact with any drugs (including THC) or their metabolites, but also they cause serious damage to health and can even kill you. Without a doubt, this myth is the stupidest.

18. Exercises

FACT

After its intake with smoke of cannabis plant, THC metabolizes and accumulates in fat cells, so eliminating the fat will help to release it and remove from the body. That’s why physical activity really does help to pass a drug test, but only if you do it long before test. The problem here is that drug metabolites like any toxins are excreted with the urination, so you need to stop doing exercises about 48 hours before test to decrease THC level in your urinary tract and produce clean urine for testing sample. Also, this process is very slow and takes a lot of time. It's next to impossible to pass the test using only this way, so it is recommended just as a part of cleansing program to support more efficient detox methods.

19. Not the first urination of the day

FACT

In case you do not substitute your sample with synthetic urine, but use your own, you should never give you first urination of the day. Morning urine is always much darker as compared to later ones because all unwanted substances accumulate in the bladder during sleep making the first urine of the day the dirtiest and heavily filled with toxins. Even if you are using effective methods of detoxification, it is still recommended to urinate at least once before giving your sample to provide for the test the cleaner urine and to increase your chances of success.

20. Claiming to be a passive user

MYTH

It is impossible to test positive for THC if you didn't smoke weed, but just were standing near or riding in car with someone who was smoking. All drug tests have a cut-off level, which defines a minimum amount of certain drug metabolites in sample required for result to be considered positive. Cut-off for marijuana urine test is 50 nanograms per milliliter. This level cannot be achieved by passive inhalation even if you were living in a room filled with smoke, only by direct ingestion. It means that claiming to be a passive user cannot be a legitimate reason to prevent screening or justify yourself in case of positive result.

Read also: How To Pass A Urine Drug Test For Weed