Certain tests can be performed with your blood or urine to know if you are using drugs. One of those is the THC urine test which will search for tetrahydrocannabinol (THC) – a metabolite of marijuana. Hydroxychloroquine pediatric lupus People on plaquenil Plaquenil pregnancy category arthritis Doctors give trusted answers on uses, effects, side-effects, and cautions Dr. Liporace on can plaquenil show positive drug test Although Provigil is a stimulant of sorts, its chemical makeup is dissimilar to amphetamines and should not cause a false positive drug test. Helpful, trusted answers from doctors Dr. Srivastava on what causes false positives in marijuana drug testing My guess is that the level of thc in the semen would probably be very small, if detectable at all. You might be more likely to test positive from inhaling second hand smoke when he smokes pot near you. But other medications have been implicated to potentiall cause false positives in rare cases for THC in urine testing. see this article. chronic use of ibuprofen and naproxen have been reported to cause false positives for cannaboid testing and barbituate urine testing. let me know if you have questions. But sometimes, this test can give a false positive when you have never used marijuana. Since laboratory people are involved in the analysis process for THC in the urine, there is a chance of human error such as wrong labeling or external contamination. A positive result will indicate a recent use of this drug. Plaquenil false positive thc I was told several years ago that plaquenil can cause a false positive., What causes false positives in marijuana drug testing. Running fevers since going off plaquenilCrest plaquenilDoes plaquenil help fibromyalgiaCompound drug for plaquenil Testing for marijuana most often consists of a urine test, according to the Centers for Disease Control and Prevention 1 2. While most people who do not use marijuana will test negatively for the substance, some medications can cause a false positive reading 4. It is wise to bring all medications along when you're being tested for marijuana. What Causes False Positives in Marijuana Drug Testing? Healthfully. I was told several years ago that plaquenil can cause a.. Causes of False Positive THC Urine Test New Health Advisor. We hear “false positive” as a defense from professional athletes all the time when it comes to drug screens—but unexpected results on drug tests really do happen. A urine drug screen tests for the presence of certain illegal drugs and prescription medications. Hi Boni, yes very possible depending on the test. If you had a false positive, ask for a better test. Maybe blood draw or hair test. You may endup having to pay for it, but if it conerns getting your meds, it's important enough. What Can Cause A False Positive For Marijuana THC? What Can Cause A False Positive For Marijuana THC? There has always been much disagreement between drug test manufacturers, companies providing drug tests and the public that must take drug tests as to the validity of false positive drug tests for Marijuana THC, which is an Amphetamine.