Best Way to Pass a Drug Test on Short Notice

With modern technology improving these days, classic ways in faking a drug test can now easily be detected. If you are looking at passing a drug test successfully, this article will highlight the best way to pass a drug test on short notice.

Among the so-called famous ways to pass a drug test include placing salt in the urine sample, or even using another person’s pee. These days, these techniques no longer work effectively. The best way to ensure success is to prep your body as much as possible, and way in advance. 

How so? If you are using substances, it may be best to stop using them way before taking the test. This could be tricky if the time is not enough in clearing away traces of substances. 

Know your test

The most popular 5-panel test screens for amphetamines (meth, speed, ecstasy and crank), opiates (codeine, morphine, opium and heroin), cocaine (crack, coke), cannabinoids (hash, marijuana), and phencyclidine.

In general, drugs stay in your system for the following amounts of time:

  • Cannabis: 1-7 days
  • Cocaine: 2-3 days
  • Opiates or Methadone: 1-3 days
  • Amphetamines: 2-3 days
  • PCP: 7-14 days

When it comes to drug tests, you may need to take one or more of the four types available: blood tests, urine tests, hair tests and saliva tests. Understanding the differences of these tests will prove helpful to you. 

  • Blood Tests are commonly given if you are suspected with drug intoxication. This is challenging to pass if you used drugs recently because it is quite effective in accurately determining the amount of substances in your body. 
  • Urine Tests are considered as the most common, especially in companies. They can be tampered with easily, because you are given a window of privacy, that is, when preparing for a urine sample, unless you are being monitored. 
  • Hair Tests are difficult to alter. The process involves evaluating about 120 hair strands inside a laboratory in order to identify drug traces. While it cannot tell whether you have taken drugs for the past couple of weeks, not that these drug traces can remain in the hair for about 90 days, which is why it is a good way to catch regular users. 
  • Saliva Tests are usually used as an alternative option to blood or urine tests. 

If you are given the option, choose one that is least likely to fail you. While there is no guarantee of a negative result, you have a good chance of passing a drug test

  • A saliva or blood test is ideal if you have used drug substances only a few times, and if you have done so at least one week ago. Most drugs no longer stay in your body after a few days or hours. 
  • If you are high and you need to take the test immediately, you may want a urine test. This type of test is less sensitive in testing for the accurate substance levels in your body. It does not give a measurement of the THC levels. 
  • If you have used substances for the first time within the week, a hair test is the best bet. This is because your intake in the previous weeks will not be detected, but will measure substance use 90 days back. 

Tips for passing a drug test on the same day

Let us consider some possible options that you can take in order to pass a drug test scheduled for today or tomorrow. 

Urine Test (Urinalysis)

If you are using marijuana, the best way to remove THC from your body is with a detox kit. These kits usually come in a ready-to-drink form which contains super boost tables and a supplement that guarantees fast result. Common kits also include a urine test kit, allowing you to test first at home, feeling confident that when you need to go for a test, there will be no annoying results. 

To use this kit effectively, it is best to use drugs as soon as you find out the need to take a test. If you still have days to prepare, make sure to have a lot of water intake. Make sure to follow the instructions on the detox kit. 

A couple of hours before the actual test, it will also help to drink more water, before drinking the detox drink and the tabs after 20 minutes. Make sure to urinate to flush your body out with substances. An hour before the test, use the test device. Two lines mean negative. However, if you see a single line, you can then take the detox supplement included in the kit and drink more water. 

Saliva Test

There are products that you can use to pass a drug test. For example, you can get some detox mouthwashes, designed to cleanse traces of substances in your mouth. Days before taking the test, it is best to stop consuming drugs. Brush your teeth well thrice a day, cleaning the cheeks, gum line and tongue area. These are the parts that will be swabbed for the saliva test. 

Drink a lot of water. Chewing ice is also known to help move the fluids in the oral cavity. About 15 minutes before the scheduled test, use the detox mouthwash, about half of the bottle. Gargle for around two to three minutes, before spitting it out. Repeat the same steps ten minutes into the test. 

When using this mouthwash, avoid taking other liquids or foods. Avoid chewing or smoking tobacco as well. If you are allowed to hold the swab stick, avoid the area between the teeth and the gum line. 

Hair Test

To pass a hair test, you can use a specially designed detox shampoo. Before taking the test, moisten your hair and use the shampoo. Massage the shampoo deep into the hair, cleaning it well for about five minutes before rinsing it. Repeat the process for another time. Dry your hair with a towel. It is best to avid using combs, brushes and other tools that you may have used before and may have been contaminated by drug or smoke particles. 

Others choose to shave their head, so that they can take the test in another way. If this is your option, make sure to prepare a good explanation for a clean-shaven head. Some of the most common reasons include hair thinning, or if you are working out on a new hair style. Creating a story about a medical condition may not really help, as you may only be required to take other tests. 


The best way to pass a drug test on short notice depends on a number of factors, as highlighted in this article. These factors include level of intoxication and the type of test that you are planning to take. While the best way is still to prepare your body and come to the testing center clean, the methods mentioned above may increase your chances of passing a drug test even on a short notice. 

Bikas Gurung

Bikas Gurung is a human rights activist representing International Drug Policy Consortium (IDPC) and United Nations Strategic Advisory Group on drug use. He received his Master’s degree in Public Health from Chulalongkorn University in Thailand and has been recognized for his work by winning "The Best Film Award" at the 2013 Harm Reduction Conference in Vilnius, Lithuania.