They’re used to help treat fever, inflammation, and pain. Ibuprofen (Motrin, Advil) and naproxen (Aleve, Naprosyn) are in a group of medications called nonsteroidal anti-inflammatory medications ( NSAIDs). Taking phentermine can cause false positive urine test results for amphetamines. Phentermine (Adipex-P) is FDA-approved to help some people lose weight. Used for sinus and nasal congestion, pseudoephedrine (Sudafed) may cause false positive test results for amphetamine or methamphetamine. Some reports have also shown that diphenhydramine may turn a drug test positive for PCP. Typical doses of diphenhydramine may not cause a false positive result. But it’s not clear what dose of diphenhydramine would cause a false positive result. Diphenhydramine may cause a false positive result for some opioids and opiates. Diphenhydramine (Benadryl)ĭiphenhydramine is an antihistamine that can help treat allergies, itching, and cold symptoms. If you’ve taken dextromethorphan, a urine test may show positive for PCP. Dextromethorphan (Robitussin, Delsym)ĭextromethorphan is the main ingredient in many OTC cough suppressants. Medications that may cause false positives 1. Methylenedioxymethamphetamine ( MDMA), more commonly known as ecstasy These include drug tests that look for:Ĭertain prescription opioids and opiates (like methadone, fentanyl, and tramadol) Some urine drug tests screen for a specific medication and substances. Illegal opiates and opioids (like heroin)Īmphetamines (like prescription amphetamines like Adderall and illegal methamphetamine)īarbiturates (like phenobarbital, butalbital)īenzodiazepines like alprazolam (Xanax) and lorazepam (Ativan) Prescription opiates and opioids like oxycodone (Roxicodone, Oxycontin), hydrocodone, and morphine (MS Contin) THC, or tetrahydrocannabinol, an active ingredient in cannabis Many urine drug tests test for the following medications and substances: They’re also common during mental health evaluations. Urine drug tests can be a common part of an evaluation in an emergency department. Just like with job interviews, some employers may require their employees to complete drug tests every so often. Some companies may ask potential hires to complete a drug screening. Your healthcare provider may request a urine drug test to make sure there aren’t other substances in your system that could be dangerous when combined with opioids. If you’re prescribed a controlled substance like opioids. ![]() There are many reasons you might get a urine drug screen. ![]() This includes prescription medications or certain illegal substances. Urine drug tests look for the presence of specific substances. What’s a urine drug test?īefore we get into the medications that can cause a false positive result, let’s discuss what a urine drug test is and why you might have one. Below we'll review a few that might have this effect. But more often, certain medications are the cause of a false positive result. Sometimes a false positive can be the result of a laboratory error. Unfortunately, inaccurate results on drug tests can happen.įor instance, a “ false positive” is when a drug test shows the presence of a medication or substance that you aren't actually taking. The most common type of drug test is a urine test. A drug test can detect the presence of certain medications and substances.
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