Despite the ongoing debates of its fairness and effectiveness, workplace drug testing remains an inconvenient reality in many companies. Employers may require you to take drug tests both before and after hiring. In most cases, the tests are conducted by third party laboratories or at the workplace under the guidance and often even in the presence of healthcare workers. The punishment for a positive test may range from rehabilitation to firing and even loss of unemployment rights. Thus, it is better to be informed on how to pass a drug test to avoid occasional negative implications.

According to the recent estimates, about 40% of the US workers have to go through drug testing. In 2014, about 350, 000 of those tests were positive. The most popular detected substance choices included marijuana, amphetamines and painkillers. The employers believe that addiction-free workforce is safer and more efficient. At the same time, painkillers are prescribed by doctors and marijuana is legalized in many places. The usefulness of drug testing is debatable, but it's a reality and the consequences can be dramatic.

What Tests Can Be Used to Detect Drugs?

Whereas false positive tests are possible, in most cases drug tests give rather accurate results. The tests can be conducted before employment, due to reasonable suspicion, post-accident, randomly or periodically.

  1. Urine drug test
  2. The urinalysis or urine drug testing (UDT) is the most common drug test. It indicates the presence of drug metabolites (products after human body breaks them down) in a person’s urine. This test can be easily conducted at the workplace, for instance, in the healthcare unit. In other cases you can be invited into specialized laboratories. To prevent all kinds of cheating, you will be required to wash your hands before entering the bathroom and leave your bags, purses and coats outside.

    Urine drug test

    How long does it take to clean your urine before testing? The positive test does not mean that an individual was under substance while taking a test. The detection period can vary from substance to substance and depends on your weight and health condition, ranging from a couple of days to two months. The UDTs can be used to screen marijuana, cocaine, amphetamines, opiates and PCP. The test is useless for screening alcohol.

  3. Hair drug test
  4. Hair drug testing screens a head or body hair for the presence of parent drugs or their metabolites. The tests require hair at least 1.5 inch (1.3 cm) long. If head hair is too short, body hair can be used as well. Importantly, the substances cannot be washed out with shampoo, dyes, permanents or any other detergents. The approximate detection time frame is 5 days after the substance use and up to 90 days after it (even longer for body hair). The substances that can be detected with hair testing include marijuana, cocaine, amphetamines, opiates and PCP.

    Hair drug test

    Currently, there are no simple ways for adulterating the hair test results. The laboratories claim that they discover five times more abusers than urine tests. By contrast to urinalysis, hair tests focus on multiple times users. Importantly, passive exposure to substances (second-hand smoking) cannot interfere with the hair test results.

  5. Saliva drug test
  6. One of the main advantages of the saliva drug test is its early detection window. Unlike urine or hair tests, saliva testing can detect substances within the first few hours after use. It is the most appropriate testing method for reasonable suspicion and post-accident cases. The methods can be used for screening individuals for marijuana, cocaine, opiates, amphetamines and methamphetamines.

    Saliva drug test

    Additionally, saliva drug tests (mouth swab drug tests is another term) screen individuals for parent substance compounds. It means that unlike other drug testing methods, the oral fluid testing can be used for detecting not only the presence of drug, but also its concentration.

    Saliva drug testing is incredibly difficult to cheat. The substances cannot be washed out with mouthwash or toothpaste. Testing samples are hard to substitute. Unlike urine drug testing, saliva test doesn’t require privacy. No third party services are required for collecting sample of saliva, as it can be done nearly anywhere and just in a couple of minutes. The laboratories claim that while it is easy and convenient, saliva drug testing is as precise as blood test.

  7. Blood drug test
  8. Blood drug testing is the most precise method for detecting recent use of marijuana and other substances. Blood drug testing searches for parent substances in your blood, instead of their metabolites. Due to the difficulty and cost of administering them, blood drug tests are rarely used for workplace testing. They are typically applied in investigations of accidents when legal circumstances are at stake.

    Blood drug test

    The detection time frame is shorter than in other tests. Drugs can wash out of your blood naturally within up to a week. Unlike the months of possible detection in urine and hair testing, 7 days are usually enough for cleaning out blood even for heavy smokers. More detailed information on the detection time frame for different substances can be accessed here:

How to Pass a Drug Test?

One of the most obvious answers to the question how to pass a drug test fast is to not do drugs. Even in this case, however, your test can be positive. How is this possible? There are prescribed medications and even types of food which can interfere with the test results. Though false positives are possible, defending your innocence is your responsibility. Therefore, you should inform the laboratory employee on all the prescribed medications, vitamins and even non- traditional healthcare products you take.

Along with taking this first precautionary measure, the following are the recommendations for cleaning your body before different types of drug tests:

How to Pass a Urine Drug Test?

If you are wondering how to pass a urine drug test fast (in a week or even one day), you should know that without specialized products it is close to impossible. Urine can contain marijuana metabolites for up to 90 days.


  • Drink a lot of water for internal dilution. With its possible negative effects on your health, it doesn't work. The diluted sample can result in a failed test and retest.
  • Add water to sample for external dilution. The diluted sample will have the same result as discussed above.
  • Add homemade adulterants (soap, salt, vinegar, ammonia) to your sample. None of these can mask or destroy metabolites.

Best Ways to Cheat:

  • Another person's urine can help. You may, however, have difficulties with storing and heating it to the body temperature.
  • Synthetic urine can be a better option in terms of its convenience and special heating pads. Simply choose a trusted brand, like Ultra Pure, for example.
  • Detox drinks, like QCARBO FAST CLEANSING FORMULA or Ultra Mask One Hour Cleansing Formula which have lots of positive feedbacks and can answer the question how to pass a drug test for weed in 3 days or faster.

How to Pass a Hair Follicle Drug Test?

Hair drug test can go as far as 90 days into the past.


  • Shave all of your head and body hair off. In this case, lab workers won’t have opportunity to take a sample. Bingo! Guess what? Laboratories know this trick and they can get suspicious, marking your test as failed.
  • Drink plenty of water. This tip doesn't work even for urine test, not to mention hair drug tests for THC.
  • Use Do-It-Yourself Detox Shampoos. The recommended ingredients like vinegar and acids are hard on your hair but cannot wash drug metabolites out of your hair follicles.

Best Way to Cheat:

The best way to beat it is to use industrial products developed by specialists, such as Test Pass Detox Shampoo and Foli-Kleen Intense Hair Cleanser, for example.

How to Pass a Saliva Drug Test?


Brush your teeth and gurgle your throat right before the test. The truth is that non-specialized detergents are unable to wash parent substances out of your saliva.

Best Way to Cheat:

If you have doubts how to pass a mouth swab test for opiates or cocaine, go for trusted detoxing products, like Detoxifying Mouthwash by Stinger or Ultra Wash Toxin-Cleansing mouthwash.

How to Pass a Blood Drug Test?

Blood test is the least common, the most precise one and nearly impossible to cheat.

Myths and Best Way to Cheat

All of the tips discussed above are ineffective for passing a blood drug test fast. In most cases you won’t have time and opportunity to detoxify your body before a blood test, requested by an insurance company or legal bodies. So, we only wish you to never ever get into situations, associated with taking blood drug tests.

If the question how to pass a drug test successfully still keeps you awake at night, try home drug tests. In this case, you will rest assured that your body is clean and you may forget all the tips and cheating schemes above.

Below is a list of pages containing detailed information on the most popular drugs, where you may learn how long they stay in your body systems.