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Drug Testing

How To Pass A Mouth Swab Drug Test: Doctor’s Tips

With recreational drug usage being legal in many US states, there is a need to strike a balance in such usage in these societies. How to pass a mouth swab drug test becomes a relevant concern for those who occasionally indulge. It is easy to overuse and get addicted to such substances. Those working need to keep in mind the drug-related policies in the workplace. Many organizations have an anti-usage policy, especially during working hours. Others run urine drug tests and mouth swab tests to detect the usage of addictive substances.

Mouth swab test

Here we look at how you can pass a mouth swab test for saliva drugs. The way swab tests work, what are the substances that are detected, and how one can detox their system before such tests are discussed in the sections below.

Why Are Mouth Swab Drug Tests So Common?

Mouth swab tests are commonly done in workplaces because they are cheaper than urine drug tests. Hence, such tests are cost-effective and provide results quickly. Also, mouth swabs are harder to tamper with. The detection window is short for oral fluid tests. Hence you need to know how long does weed stay in your system after a couple of puffs.

Understanding the Mouth Swab Drug Test – How to Pass Oral Swab Drug Test

Mouth swab tests are common in workplaces for the following reasons:

  • They are easy to administer and are cost-effective
  • They are difficult to tamper with
  • Such drug tests can effectively detect substances consumed within a short time before the test
  • There is no need for preparation; also these tests are non-invasive

There are several workplaces where such tests are conducted. For instance:

  • Offices of national security
  • Law enforcement agencies
  • Workplaces linked to public health and safety

Types of Saliva Tests 

Saliva drug tests can be done for the following detections:

  1. Identify endocrine markers
  2. Immunologic conditions
  3. Infections
  4. Inflammatory conditions
  5. To identify steroid hormones

Substances that are commonly detected in a saliva swab drug test are cocaine, opiates, marijuana, alcohol, and amphetamine. Cut-off levels indicate amounts that ensure the presence of a substance in the test subject’s system. This is usually a level that ensures that there is no false positive in a test. What color does a saliva drug test turn if you fail? It is usually reddish purple.

Class of Drug Confirmation Cut-Off Level
Marijuana or THC 1.5 ng/ml
Opiates 120 ng/ml
methamphetamines 120 ng/ml
oxycodone 30 ng/ml

Detection Time for Different Substances 

How long do different substances stay detectable in one’s saliva? It depends on different factors as discussed below which are helpful when you wish to know how to pass a drug test with THC in your system.

Factors that Affect the Duration

These are the following:

  • Half-Life of the Drug

This differs among different drug classes. Some exist for minutes or hours. Others can be detectable for weeks and days.

  • Hydration and Body Mass

The amount of fluid retained in one’s body as well as one’s body mass will determine how long substances can be detected. For instance, if one has a larger body mass then substances stay detectable for a longer time.

  • Metabolism and Physical Activity

These aspects also determine how fast substances get metabolized and are excreted from the system.

  • Age

Older people will take longer to process substances such as drugs or alcohol in their kidneys and liver, as compared to younger people.

  • Tolerance

The more one uses a particular drug they develop tolerance towards the same. Such people will have the drugs detectable in their system for a long.

  • Purity of Substances

Dealers and manufacturers often put in cheap synthetics in common drugs. This also impacts how long drug elements remain in one’s body.

  • Type of Test

It depends on which substances are detected. For instance, in urine drug tests, the detection window is longer and it is even longer for follicle tests. On the other hand, a mouth swab or saliva drug test has a short detection window.

Detection Windows for Various Substances

Detection windows differ for different drugs. This depends on the half-lives of substances. For instance:

Substance Half-life
Cocaine 1-hour
Heroin 2 to 6 minutes
Marijuana 4 to 6 days
MDMA 8 hours
Methamphetamine 11 hours

Special Note

If you are a heavy user of marijuana you need to refrain from the same for at least 2 to 3 weeks. Also, active detox of your system is required before drug testing. In the case of a swab drug test, it is easier to pass since the detection window of such a test is of short duration.

Tricks that Can Beat a Mouth Swab Drug Test – How to Pass a Drug Test with Weed in Your System

If you wish to know how to pass a saliva drug test home remedies here are some tricks that can come of use:

  • High-Fat Foods

Consuming high-fat food items can help remove THC from your system effectively. That is because they bind to fat molecules effectively and then get ejected from the system. In such ways, dietary fats help eliminate THC from one’s body. Good examples of dietary fat items that are healthy are olive oil-infused salads, avocados, and nuts such as almonds and walnuts.

  • Maintaining Saliva Production

It is important to produce fresh saliva that will help lower the chances of drug concentration in the sample. Hence, one should hydrate well for several hours before they take a test. This can also help remove toxins or flush one’s system of harmful metabolites faster. Most detox products also recommend users drink lots of fluids such as water and juices. One should avoid consuming dehydrating fluids such as caffeine-enriched drinks.

  • Oral Hygiene

Brushing one’s teeth can help remove bits and traces of addictive substances from one’s mouth. For effective results, one should use a soft-bristled toothbrush and good-quality toothpaste.

  • Gargling

While gargling with water does not ensure much difference, alcohol-based mouthwashes are known to be effective. This will especially help right before one goes in for a mouth swab test.

The Most Reliable Way to Pass a Mouth Swab Drug Test

Besides the above tricks the following products can also help increase the chances of one passing a mouth swab test for drugs:

  • Sour Candies

It has been seen that chewing sour candies helps increase acidity levels in one’s saliva. This in turn can reduce drug traces in one’s mouth.

  • Chewing Gum

This is also a helpful trick. By chewing gum one increases saliva production. This in turn can help clean one’s mouth naturally of drug metabolites and traces of the same. It is best to opt for sugar-free gum in this aspect.

  • Hydrogen Peroxide Rinse

This is yet another effective way to remove adulterants from your mouth. This is a known remedy for overcoming bacterial growth in one’s mouth or even soothe a sore throat. However, it should be diluted and used as per the instructions provided.

Mouthwashes to Pass a Saliva Drug Test

Mouth swab drug test mouthwash is an effective product for passing mouth swab tests. Here we take a look at two such products in the market:

  • Toxin Rid Rescue Wash

This is a reliable solution, especially for infrequent weed users. This product can be bought as a single-use solution as well. One bottle includes a single ounce of liquid mouthwash in concentrated form. It coats the mouth and neutralizes it, helping users avoid detection within a 30-minute mouth swab drug test weed timeline. Though it is known to be effective, its effects are short-term. Also, it is an expensive solution that might not prove effective for many.

It is made of ingredients such as Alfalfa, calcium carbonate, minerals, vitamins, and Pacific kelp. It is a product of the Testclear brand, known for its different detox products.

  • Stinger Detox Mouthwash

This can be yet another effective remedy for knowing how to pass a mouth swab test in 12 hours. It is made by the Stinger brand, yet another manufacturer in the field of detox products. The mouthwash is made of ingredients such as taurine, MSM, D-ribose, lysine, niacin, vitamins, and minerals. The single-use 2-ounce bottles are often found to be expensive and might not guarantee results.

Product Price Key Ingredients How it Works
Toxin Rid 22 USD Alfalfa, calcium carbonate, minerals, vitamins, and Pacific kelp Use the full amount for swirling in the mouth to coat the same
Stinger 9 USD taurine, MSM, D-ribose, lysine, niacin To swirl in the mouth directly without diluting


  • How Long Before a Mouth Swab Test Can I Consume Recreational Drugs?

If you are an infrequent user, ensure that you refrain from using such substances at least 48 hours before a mouth swab test.

  • What Kind of Substances Can Be Detected in a Mouth Swab Test?

This can be any beverage, food including alcohol or drugs. The latter items can be detected within a time frame of 24 to 48 hours.

  • Can I Use Mouthwash Detox Products to Pass Such a Test?

Yes, alcohol-based detox mouthwash products are known to be effective.


If you are about to face a mouth swab test, ensure that you refrain from using recreational drugs at least a few days before the same. It is also wise to detox your system as much as possible. This can include cleansing your mouth as well as your body with a healthy diet and lots of fluids.

While strategies for passing the test may exist, it’s essential to recognize the deeper issue at hand. Drug addiction is a serious health concern that needs professional help and support. You will find it in our rehab, which provides a structured environment, counseling, and resources necessary for individuals to overcome addiction and build a foundation for a healthier future. Look for more information on our website.