Mouth swab drug tests are used in various settings, such as workplaces and rehabilitation facilities. These tests are more cost-effective and less invasive than other drug tests, like samples of someone’s hair, urine, blood, or sweat.

This article will explain how mouth swab drug tests work, what substances they can detect, how long it takes to get results, and more.

How Does It Work?

A mouth swab drug test uses a long Q-tip with a sponge-like material to collect your saliva sample. It’s done by sweeping the inside of the cheek or underneath the tongue. Either you or a test administrator will perform the swab.

A mouth swab drug test is brief, lasting only one to three minutes. Additionally, you do not need to prepare for the test in any way. You are typically asked not to eat or drink anything around 10 minutes before the test.

What Does It Test For?

Mouth swab drug tests can detect a variety of different substances, including:

Alcohol Amphetamines Barbiturates Benzodiazepines Cocaine Marijuana (THC) Methamphetamine Opioids Phencyclidine (PCP)

How Accurate Is a Mouth Swab Drug Test?

If the mouth swab drug test is performed correctly, the test has an accuracy of 97.5%.

Factors Influencing Results

Research has shown that certain factors affect whether substances can be detected by a mouth swab drug tests. Eating or drinking within 10 to 15 minutes of the test, for instance, has been shown to interfere with results.

Other circumstances can also influence the accuracy of a saliva test. These include:

How much of the substance was consumedFrequency of substance useQuality of the drug (which can be affected if other substances were mixed with it)AgeLiver and kidney healthBody mass and metabolismAmount of water in the body

Detecting Substances After Use

Ultimately, the type of drug being tested for and when it was last used will contribute to whether you get a positive reading.

Marijuana can usually be detected via a mouth swab if you have used it within 24 hours. For opiates, the length of time varies.

If your mouth swab drug test needs to be sent to a lab, you can expect results within 24 hours. For mouth swab drug tests that can be interpreted on-site, results can occur within minutes.

If you work in an industry related to transportation, national safety, or public safety, you may be required by law to undergo regular drug testing.

Depending on the regulations, those who test positive may be directed to substance abuse programs, which means you may not be immediately dismissed for having drugs in your saliva.

Laws for other industries vary by state. Testing oral fluids via a mouth swab is not allowed in Hawaii, Maine, Puerto Rico, and Vermont.

Benefits of Mouth Swab Drug Tests Over Other Types

There are several benefits to using a mouth swab drug test over other types of drug-screening processes, including urine tests and hair analysis. These benefits include:

It’s non-invasiveIt’s more cost-effectiveIt can detect current usageYou’ll get fast resultsIt’s more difficult to tamper with resultsIt’s quick and convenient

Summary

Mouth swab drug tests are a drug screening tool that uses saliva to detect various substances in your system. These tests are painless and quick, sometimes delivering results in minutes. Mouth swab tests are usually best for detecting recent drug use. Mouth swab drug tests are typically used to detect alcohol, amphetamines, cocaine, marijuana, opioids, and more.

A Word From Verywell

Some workplaces require drug screenings for employment. A mouth swab drug test is less invasive and cost-effective than other types of drug screening like collecting blood or saliva samples. If you are struggling with substance use, know you are not alone. Reach out to a healthcare provider to discuss resources and get help. Addiction is a disease and not your fault.

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