Knowing how to pass a mouth swab drug test is a must. The last thing anyone wants after having a great time is to be startled with an unwanted mouth swab drug test. Unfortunately, there is no prior notice given for these tests. And the majority of the time, they are required by businesses or mandated by various institutions. Here’s everything you need to know to stay prepared:

What’s the Use of Mouth Swab Drug Tests?

A mouth swab drug test is done to detect any indications of drug usage. It’s primarily used for job screenings or roadside checks that disallow those under the influence of drugs or alcohol. A drug test, of course, is not the type of test you want to fail. We want to avoid that as much as possible.

As part of the process, a sterile swab will be used and placed between the cheeks. Then, it will be moved around the corners of the mouth to assess any traces of foreign substances. Swabs are then rested inside a person’s mouth for 3 to 5 minutes. After this, you can get your results in an hour or a day. This, however, will depend on whether the test is conducted in a lab or through a drug test kit.

With these types of tests, is it still possible to answer how to pass a mouth swab test is conducted in a lab? Yes. But don’t worry, we’ll get to that later.

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How Can Mouth Swab Drug Tests Tell if I’m High?

Nowadays, mouth swab drug tests are gaining popularity as a mandatory requirement in many institutions. These drug tests are more accurate, convenient, fast, and it doesn’t require invasive procedures.

Different biological materials can be easily analyzed in a mouth swab. As a result, lab professionals can quickly identify information about any current foreign substance. Typically, mouth swab drug tests are used to detect Tetrahydrocannabinol (THC) in cannabis products that cause euphoria and other psychoactive effects.

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What Can Mouth Swab Drug Tests Detect?

Actually, mouth swab tests are expected to detect any foreign or unfamiliar substance in the body. So whether it’s meth or marijuana, drug tests can generally detect all of these. For more information about this, please refer to the table below:

Substance: Testing Time: Detection or Identification Rate:


Methamphetamine (“Meth”)


After the test is completed, results can be detected in 10 minutes.


For frequent users, meth can be detected for up to four days. However, for light users, this time can be reduced.




Marijuana (“Weed”)




After 1 to 4 hours, the results can be confirmed.


This can last for up to 6 weeks in the body. A person can be tested positive for mouth swabs up to 34 to 48 hours after last dated use.



Cocaine (“Crack”)



Cocaine can be detected within only a few hours after conducting the test.


Cocaine can linger inside the body for about 1 to 4 days. For frequent users, however, it can last up to a couple of weeks.




Benzodiazepines (“Benzos”)


This is dependent on the metabolites being examined. However, it is expected to take between 2 and 8 hours.



It can be detected for 5 to 10 days after substance use, depending on the variation.



MDMA (“Molly”)



After a few minutes to an hour, the results can be traced immediately.


MDMA has a shorter life span in terms of detection than other drugs. After or within 24 hours, the majority of the traces will be gone.




Heroin and Other Opiates


In contrast to other substances, the testing time for heroin is unpredictable. It usually varies depending on the person’s current body condition.


Two hours is said to be the most common time frame for heroin use. However, this does not apply to everyone.



Opiates are traceable for 24 to 36 hours in the saliva.


The information presented above is based on the most recent substance retention research. However, it’s important to remember that these are primarily dependent on your health, frequency of substance use, weight, and the substance itself. If you’re scheduled to take a drug test, make sure to take measurements well ahead of time to avoid failing the test.

5 Possible Answers to How to Pass a Mouth Swab Drug Test:

Proceeding to the main reason why you’re probably here, let’s break down the things you can do if you have a drug test coming up. There two key things you must know that will explain why these tips might work:

First, dilution is the word you’re looking for. To dilute the presence of the substance means to reduce its traces in both your mouth and body. Since it is scientifically impossible to “take out” something that’s consumed, “desaturating” the clues is what’s going to take you places.

The second is the frequency of your consumption. It’s similar to removing stains. The more severe or intense color is, the harder it is to dilute or remove. The answer to this is time. If you’re lucky enough to have time on your hands, it will be a lot easier for you to dilute the presence of a substance.

Although these tips don’t have enough research to back them up, some users have found success. So, it’s worth trying. Below are some of the ways to pass a mouth swab drug test:

  1. Hydrogen Peroxide

Many people recommend hydrogen peroxide as an adulterant for passing the swab test. Within a few hours, this disinfectant is said to remove all traces of the substance. In simpler words, you use it as you would with a mouthwash.

Gargle it and swish it around in your mouth for 30 seconds. After that, rinse your mouth with water once more. This can be done in days or hours leading up to the exam. Some even claim to have succeeded after only a few minutes of putting this method to the test. It’s supposed to be powerful enough to get rid of any foreign substances in your mouth.

But keep in mind that hydrogen peroxide should not be taken lightly. It’s a powerful substance. Therefore, it’s recommended that you try this method with hydrogen peroxide that only has a 3% concentration level. Excessive amounts can harm your tissues, so stay within the 3 percent range.

Be careful to not ingest it as it can damage your internal organs. Always be cautious when using hydrogen peroxide, and don’t let it sit in your mouth for too long.

  1. Vinegar

Vinegar is thought to be effective in passing the hair follicle test. So, other people decided to try it for mouth swab drug tests. Surprisingly, different people have had success with only using vinegar. Those who support this method recommend vinegar to people who have recently consumed THC from cannabis products.

This is supposed to work by burning fat and speeding up metabolism. This is significant because THC and other cannabis compounds are stored in fat. It must be noted that this might not be the case for other substances.

Apple cider vinegar and balsamic vinegar are the variations recommended by the advocates of this method. It’s important to know that this method is not in any way confirmed by scientific studies. So, what works for other people may not work for you. Still, it’s worth giving the shot.

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  1. The Classic Toothpaste and Mouthwash Combo

Other users claim that simply brushing your teeth and gargling with regular mouthwash is sufficient for passing a mouth swab drug test. This method is recommended for people who haven’t consumed a lot of drugs. Brushing more vigorously than usual can aid in the removal of drug traces from the mouth. However, it doesn’t do anything on the inside. This is why it’s only recommended for light users.

People who tried this method recommend gargling every 15 minutes within a 4 to 5-hour window. Gargling for about 20 to 30 seconds is also recommended. The cheek walls, tongue, and spaces between the teeth all require more attention when brushing. As extreme as this may sound, others are confident that it can dilute short-lived drug presence inside the mouth.

  1. Gum and Sour Treats

No, we’re not talking about delicious weed edibles here!

As strange as it may seem, it worked for some people. Chewing gum can increase your saliva rate. This method has been discovered to be capable of diluting any existing concentration in the mouth. Cinnamon or citrus flavors are recommended because they are typically more robust than other flavors.

See, saliva naturally becomes more acidic when eating sour candies. This is a good thing because the more sugary and acidic the saliva becomes, the more difficult it becomes to track down drug substances. Therefore, it is advised to consume 2 to 3 sour candies. It works better if the candies are consumed two to three hours before the drug test. Again, these assertions have not undergone any scientific basis, so use them at your own risk.

  1. Tolerance Break

Among all the possible answers on how to pass a mouth swab drug test, nothing works as effectively as time. Taking a tolerance break may take a few days to an entire month. But unlike the rest of these suggestions, taking time before consuming drugs again is failproof. No detox tea or magic pill can suck up the substance in your body as better as time does. So, think about it before purchasing expensive purifying teas.

So, trust your guts. If you feel like a test is bound to happen in your workplace soon, you can take a couple of days off. Or, you can take a week without consuming any substance. As hard as it may sound for some people, this tip will cause you less stress and anxiety.


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