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10 Common Drug Testing Myths

by | Dec 23, 2023 | Uncategorized

Drug testing is a standard practice in various settings, such as the workplace, sports, and legal proceedings. However, this prevalence has also led to numerous myths and misconceptions about drug testing. To provide a better understanding of this topic, we have compiled a list of the top ten drug testing myths you should know.

Myth #1: You can "sweat out" drugs before a drug test.

Fact: There is no scientific evidence to support the claim that you can "sweat out" drugs to pass a drug test. While exercise and sweating can help to rid your body of toxins, drug metabolites are stored in your fat cells and released slowly over time. Sweating alone is unlikely to have a significant impact on drug test results. It’s crucial to understand the facts about drug testing to ensure that you navigate the process correctly.

Myth #2: It’s easy to cheat a drug test using home remedies or commercial products.

Fact: Many products and home remedies claim to help you pass a drug test, but most of them are unreliable and ineffective. Labs have evolved to detect these "cheat" methods, which can result in failed tests or suspicion. Moreover, trying to cheat a drug test can lead to serious consequences, such as losing your job or facing legal penalties.

Myth #3: You can dilute your urine to pass a drug test by drinking fluids or taking supplements.

Fact: Diluting your urine may seem like a plausible way to pass a drug test, but most modern drug tests can detect diluted samples. Drinking excessive fluids, taking diuretics, or consuming detox supplements can be ineffective and even harmful to your health. Labs may also report diluted samples as invalid or suspicious, leading to further testing or consequences.

Myth #4: Poppy seeds can cause a failed drug test.

Fact: Although poppy seeds contain trace amounts of opiates, most drug tests can account for this. You would need to consume an unrealistic amount of poppy seeds to test positive for opiates. Nevertheless, it’s best to avoid consuming large quantities of these foods before a drug test.

Myth #5: Hair drug testing can detect drug use from years ago.

Fact: Hair drug testing typically analyzes the most recent 1.5 inches of hair growth, which provides an approximate window of detection for up to 90 days. Although drugs can remain in your hair for a longer period, hair tests are designed to detect recent drug use, not past usage from years ago.

Myth #6: Prescription medications won’t cause a positive result on a drug test.

Fact: Some prescription medications can cause a positive result on a drug test, as they may contain similar substances. For instance, certain pain medications may contain opioids, which can trigger a positive result for opiates. Disclosing any prescription medication that might interfere with a drug test is crucial to avoid misunderstandings.

Myth #7: Over-the-counter medications won’t show up on a drug test.

Fact: Some over-the-counter medications can cause a positive result on a drug test. For example, certain cold and flu medications can contain pseudoephedrine, which is a controlled substance and can trigger a positive result for amphetamines. Additionally, some herbal supplements and vitamins may contain substances that can interfere with drug test results. It’s crucial to disclose any medications or supplements you are taking to avoid any misunderstandings or false positives.

Myth #8: All drug tests are the same and screen for the same substances.

Fact: Drug tests differ significantly in their methods, detection windows, and the substances they screen for. There are different types of drug tests, including urine, hair, saliva, and blood tests, each with their unique advantages and limitations. The test panels can also range from detecting a few substances to an extensive list, depending on the employer’s requirements and the test ordered.

Myth #9: Drinking vinegar or lemon juice will help you pass a drug test.

Fact: The idea that the acidic properties of vinegar or lemon juice can cleanse your system of drug metabolites is a myth. There is no scientific evidence to support this claim. Using vinegar or lemon juice to manipulate drug test results can be ineffective and cause stomach discomfort and other health issues.

Myth #10: If you’re not under the influence at the time of the drug test, you’ll pass.

Fact: Drug tests don’t just detect current drug use but can also show evidence of past use. Depending on the type of drug test, certain substances can be detected in your system for days or even weeks after use. For example, marijuana can be detected in urine for up to 30 days after last use, making it possible to fail a drug test even if you’re not currently high.

Myth #11: Drinking lots of water before a drug test will help you pass.

Fact: Drinking excessive amounts of water before a drug test may seem like a plausible way to pass, but it is ineffective and potentially harmful. Most modern drug tests can detect diluted samples, and drinking too much water can lead to water intoxication, which can be life-threatening. Furthermore, diluting your urine can cause suspicion and result in further testing or consequences.


Having an accurate understanding of drug testing is crucial to dispel common myths and ensure that you are well-informed about the process. Although drug tests are not foolproof, they have become increasingly accurate and sophisticated over the years. It is essential to approach drug testing with honesty and transparency, as attempting to cheat or manipulate the results can lead to severe consequences.

If you have more questions about the drug testing services we offer feel free to reach out and call (508) 694-9773. Additionally, if you’re ready to take the next step, click HERE to schedule your appointment today!

ARCpoint Labs of Southborough provides services to many nearby communities including Westborough, Framingham, Hopkinton, Marlborough, Franklin, Sudbury, Ashland, Milford, and Bellingham.

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