List of medication’s that may cause a false positive on a drug test
What is a false positive drug test?
When a drug test is conducted and the goal is to search for illegal drugs and commonly miss used prescription medications, and while the person performing the drug test may not do these drugs, there are certain foods, legal drugs, and other substances that may lead to a false positive on a drug test.
Most common drugs that are screened for during the drug testing process are:
· Phencyclidine (PCP)
· Opiates (opium, morphine, heroin, codeine)
Other more in depth drug test may also screen for:
· Opioids (oxycodone, hydrocodone)
The drugs that can cause false positives:
· Ibuprofen (Motrin/Advil) over-the-counter nonsteroidal anti-inflammatory medications may cause false positives for barbiturates or THC (marijuana) including PCP
· Naproxen (Aleve) over-the-counter nonsteroidal anti-inflammatory medications may cause false positives for barbiturates or THC (marijuana)
· Oxaprozin (Daypro) Treats arthritis may cause false positive for benzodiazepines.
· Phentermine (Adipex-P) Is a prescription for weight loss. It may cause false positives for amphetamines.
· Tramadol (Ultram) Is used for pain. It may cause false positive for PCP.
· Venlafaxine (Effexor XR) A antidepressant and may lead to a false positive when screening for false-positive urine test for PCP.
· Quetiapine (Seroquel) A antidepressant and may lead to a false positive when screening for methadone or opiates.
· Sertraline (Zoloft) A antidepressant and may lead to a false positive when screening for benzodiazepines or LSD on a drug test.
· Amitriptyline (Amitril) is for antidepressants and may lead to a false positive when screening for LSD.
· Bupropion (Wellbutrin) Used to treat depression. May lead to a false positive when screening for amphetamine or methamphetamine, or LSD.
5. Proton pump inhibitors
· Proton pump inhibitors (PPIs) (omeprazole, esomeprazole, pantoprazole) gastroesophageal reflux disease (GERD), and heartburn symptoms. Taking PPIs daily can result in a false-positive urine test for THC.
6. Quinolone antibiotics
· Quinolone antibiotics (levofloxacin, ofloxacin) are commonly prescribed for urinary tract infections, pneumonia, and sinus infections among other things. Levofloxacin and ofloxacin are the most likely of these antibiotics to cause a false-positive urine test for opiates, amphetamines, and methamphetamines.
· Doxylamine (Over-the-counter sleep aids) may cause a false positive on drug tests for methadone.
· Methylphenidate (ADHD) May cause false positive tests for amphetamine, LSD, or methamphetamine.
· Dextromethorphan (Robitussin, Delsym, and other over-the-counter cough suppressants.) If you’ve taken medication with dextromethorphan in it, your drug screen may be positive for opiates and PCP (phencyclidine).
· Diltiazem (Cardizem) is used to treat hypertension (high blood pressure) or to slow your heart rate if you have atrial fibrillation. If you’re taking diltiazem, your urine drug screen may test as a false positive for LSD.
· Diphenhydramine (Benadryl) is an antihistamine found in allergy medications like Benadryl and sleep aids like Tylenol PM and Advil PM. If you’ve taken diphenhydramine, your drug screen may show a positive result for opiates, methadone, or PCP.
· Metformin (Glucophage) is the most commonly prescribed oral medication for diabetes. Taking metformin may result in a positive test for amphetamine or methamphetamine.
· Used for sinus and nasal congestion, pseudoephedrine (Sudafed) can be the cause of false-positive tests for amphetamine or methamphetamine.
· Labetalol (Trandate) is both an alpha- and beta-blocker drug used for blood pressure control. If you’re taking labetalol, you could have a false positive test for amphetamine, methamphetamine, or LSD.
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