Best defense for a positive drug test

Drug tests are commonly used in workplaces, sports teams, and other areas to determine if an individual has been using prohibited or illegal drugs and is a prevention technique used to promote a drug-free workplace. Employers can test employees for alcohol and other drug use as part of an annual physical examination. A positive drug test could prevent you from getting a job or result in the loss of employment. It may result in getting kicked off a sports team or suspension. These and other serious ramifications can dramatically impact your life. With so much riding on the results of your next drug test, you understandably want to be fully prepared.

How to Prepare for a Drug Test

In some cases, random drug testing is becoming more common in the workplace, and there is nothing that you can do to prepare for them. However, when a drug test is announced ahead of time, you could take several steps to prevent a positive test result. First, you should learn more about the testing procedures. Specifically, will the test require a blood, sweat, hair, or urine sample? What drugs are being tested for? These tests commonly screen for marijuana use, phencyclidine, opiates, opioids, cocaine, and amphetamines. However, some tests may be more advanced and may also screen for benzodiazepines, hydrocodone, alcohol, MDMA, barbiturates, and other substances.

Many substances remain detectable in your system for days, weeks, or more. If you are concerned about an upcoming drug test, do not stop using substances abruptly without medical guidance.

For many substances, sudden cessation can cause severe and life-threatening withdrawal. Please consult a healthcare provider for confidential advice on how to manage your health safely. Be aware that “flushing” your system with water is not a reliable or safe method for passing a drug test.

Medications That Can Cause a False Positive on a Drug Test

Some people may take certain medications that could trigger a false positive on a hair, mouth swab and urine drug test. These include both over-the-counter and prescription medications. For example, over-the-counter cough suppressants containing dextromethorphan, including Delsym and Robitussin, may falsely indicate a positive result for PCP on a urine test. Diphenhydramine, which is a common over-the-counter allergy medicine, may trigger a false positive for both PCP and opiates. Sudafed and other sinus medications containing pseudoephedrine may produce a false positive test result for methamphetamine or amphetamine. Phentermine, a weight loss drug, can also falsely produce a positive indication for amphetamine use. Even NSAIDs, such as Motrin, Aleve, Advil, and others, may produce a false positive test result for THC, cannabis or barbiturates.

Many prescription medications can yield false positives as well. The sleeping pill trazodone can give a false positive for methamphetamine or amphetamine use. Antidepressants, such as Effexor XR, Pristiq, Sertraline, and Wellbutrin, can yield positive drug test results for various illegal substances. If you take the antipsychotic Seroquel, you may receive a false positive test result for methadone. Proton pump inhibitors, which are used to treat heartburn and acid reflux, may produce a false positive for THC. Some of the other medications that could yield false positives for various illicit substances are quinolone antibiotics and promethazine.

Before you submit your required samples for drug screening, it is important that you disclose a complete list of all medications that you have taken recently. Remember that some of these substances may still be detectable in your system for weeks after the last use. There are different types of drug tests that can be used. More sophisticated, sensitive tests can be used to detect forbidden substances. These include the high-performance liquid chromatography test and gas chromatography-mass spectrometry. The test administrator can determine the right test to use based on the medications that you have been using.

Responding to a Positive Drug Test

Receiving a positive drug test can be a stressful experience, especially given its potential impact on your work. The most important first steps are to ensure the test’s accuracy and prioritize your health.

1. Verify the Result

If you believe the result is a false positive (which can be caused by certain prescription medications), you have the right to ask for a confirmation test. These are more advanced methods, such as gas chromatography-mass spectrometry (GC-MS), that are highly accurate and can rule out an initial error.

2. Prioritize Your Health and Safety

If the result is accurate, it’s a critical sign to take your health seriously.

Important Medical Warning: If you have been using substances regularly, do not stop suddenly. Attempting to quit abruptly, especially to pass future tests, can be extremely dangerous. Withdrawal from substances like alcohol, opioids, or benzodiazepines can cause severe medical complications, including seizures, and can be fatal.

Your safest next step is to speak with a medical professional. They can provide confidential guidance. Many employers offer resources like an Employee Assistance Program (EAP), which can help you access treatment and support, often as a first step toward resolving the situation at work.

Understanding a Positive Drug Test and Your Next Steps

A positive drug test can happen for several reasons. The result may be due to a prescription medication you are taking, a ‘false positive’ from another substance, or the use of a non-prescribed substance.

Your first step is to clarify the result. If you are taking any prescription medications, be prepared to provide this information to the Medical Review Officer (MRO) or testing administrator. If you believe the result is an error, you have the right to request a confirmation test, which is a more specific method that can rule out a false positive.

If the positive test is accurate and reflects non-prescribed substance use, it is important to view this as a critical health signal. This can be an opportunity to seek confidential support. Many workplaces offer resources like an Employee Assistance Program (EAP) to help.

Important Safety Warning: If you have been using substances regularly, do not stop suddenly. Withdrawal from substances like alcohol, opioids, or benzodiazepines can be medically dangerous or even fatal. Your safest option is to speak with a healthcare provider who can help you manage your health and connect you with confidential treatment resources.

Takeaway

If your positive drug test result stems from substance misuse or addiction, seeking professional help is a proactive step toward recovery and can serve as a mitigating factor in legal or employment situations. At Recreate Life Counseling, we offer comprehensive addiction treatment programs, including medically supervised detox, individualized therapy, and aftercare planning. Our experienced team is dedicated to helping individuals overcome substance use disorders and regain control of their lives. Taking responsibility and committing to treatment not only supports your personal well-being but also demonstrates to employers or legal entities your commitment to making positive changes.

Explore Your Treatment Options Today

At Recreate Life Counseling, we know how devastating a failed drug test can be to your life. Substance abuse and addiction can have harsh effects on your employment, your personal life, and other important areas. Our compassionate, experienced team provides effective drug addiction treatment. We can support you on your journey to sobriety and help you to lead the life you want. Contact Recreate Life Counseling for a private consultation to learn more about your addiction treatment options.

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Written by: The Recreate Life Counseling Editorial Team
Editor: Isaac Adams-Hands
Medically Reviewed by: MedicallyReviewed.com

Published on: September 14, 2022
Updated on: October 23, 2025