Factors That Affect Saliva Drug Test


Saliva drug test kits are a common way to detect recent drug use. You might be wondering what factors can affect the accuracy of a saliva screen. Saliva drug testing is one of the most common methods for detecting recent usage of illicit drugs. Though it can often yield more accurate results than testing urine, there are some factors that could affect the accuracy of a saliva drug test. Read on to learn about many of these factors and the degree which they may affect your drug test. How to pass a saliva drug test yahoo answers lists the following, most important factors of a saliva screen. 

Using the following strategies may help you to pass a saliva drug test! Medications: Using drugs can affect the levels of enzymes in your body. Many drugs that are used to treat medical conditions such as cancer, high blood pressure, diabetes and heart disease can alter important enzymes that are present in your mouth. It is important to keep a current list of medications used by you or anyone in your household and be informed about what chemicals they may contain. Certain anti-anxiety medications have been known to alter saliva testing results because they over-stimulated saliva production. Some prescription pain relievers, including codeine and hydrocodone have been known to cause false positives for marijuana use because their metabolites are similar enough to be confused with THC.

Factors That Affect Saliva Drug Test :

1. Different brands of test kits

Saliva drug test kits are not all created equal. Each brand of drug test kit will use different chemicals in their testing procedures. The accuracy of your results will depend on the quality and efficiency of the tests you choose to use. It is essential that you become well acquainted with the list of chemicals being used in your saliva screen and how they work together. With a well-informed understanding, you can better control any effects they may have on your saliva screen.

2. Saliva production

The amount of saliva that you produce can greatly affect your results. Many drugs that are commonly used to treat conditions such as high blood pressure, heart disease, diabetes and cancer can mimic the body’s natural processes to produce additional saliva. This action can lead to false positive results on a drug test and may affect the accuracy of your test results. Some medications like antidepressants have been known to inhibit saliva production and lead to false negative results in a saliva screen. A dry mouth is never an excuse for failing a drug test!

3. Alcohol use

Alcohol use can cause dehydration and fluctuating blood sugar levels that play a large role in saliva testing. Alcohol consumption can affect the levels of toxins in your body that lead to false positive results during a saliva screen. Blood alcohol concentration (BAC) can increase saliva production by up to 30%. Driving under the influence of alcohol will put those who are involved at risk for both personal and legal consequences.

4. Electrolytes and pH levels

How well you are able to maintain a proper electrolyte balance affects your saliva test results. How much you eat and drink, how well your body is able to process these nutrients, and how hydrated you are can all play a roll in false positive results. The presence of poor water content could cause additional dilution or change the pH reading that is given by your saliva test kit.

5. Common food sources

Certain types of drugs may be found in common foods such as coffee, soft drinks, and alcohol. Even common snacks like potato chips can contain a chemical that could affect the accuracy of a saliva test. Though your results are likely to be affected whether you eat them or not, it is important to know what you eat and drink in order to control any possible effects on your saliva drug test results.

6. Heart disease risk factors

People who have heart disease and risk factors for heart disease should beware of a potential false positive result when using a saliva test kit. Certain diseases can alter salvia screening by causing dehydration and dry mouth conditions that lead to false positive results during drug testing. If you have controlled your heart disease risk factors, you should be more aware of possible false positive results from a saliva test.

7. Mouthwashes and toothpaste

According to the FAQ page of Pass Hair drug testing there are some common chemicals that can be found in many heavy duty mouthwashes, toothpastes, and other cosmetic products that may affect your saliva test results. Though they are not as significant as other factors listed on this list, it is important that you look over the ingredients in any products being used by yourself or others in your household to prevent false positive results.


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