No definantly not this person is aquiring street drugs or seeing another physician to get the oxy it should have been out of their system in 2 weeks. There Are Only 4 Ways To Pass A Hair Drug Test. The key to learning how to pass a hair follicle drug test is simplicity. if you are facing a hair drug test, you will have to choose on of the four strategies below.There Are No Other Choices. A false positive drug test result can be very stressful, especially with the knowledge of your sobriety. Over the counter medications, such as Tylenol and Aspirin, can trigger false positives on a drug test. Learn more about which drugs to stop taking if you have a drug test scheduled in order to avoid false results. I am a former mass transit train operator due to a false marijuana drug test. Prior to the test I had a root canal done. I took some prescription Ibuprofen 2 600mg tabs and got tested the very next day. What to do if a drug test comes back with a false positive. Imagine you are applying for a new job, and you get a call from an HR representative advising you that you tested positive for drugs. Ibuprofen, classified as a nonsteroidal anti-inflammatory medication, effectively relieves pain and reduces swelling and stiffness. Both prescription and nonprescription medications contain ibuprofen, which often occurs in combinations with other drug such as in some cough and cold medications. False Positive Drug Test Facts. A False Positive Drug Test Should Worry Anyone Undergoing A Drug Test. A false positive drug test can happen with the urine, hair, saliva or blood test, but it is far more likely with the urine drug test. What meds can cause a false positive for barbituates - Answered by a verified Doctor Additional Details Poppy Seeds. Poppy seeds, often found on bagels, rolls, and pastries have long been used as a defense against positive opiate test results encountered on a urine drug screen. Can Naltrexone cause a false positive for oxycodone? I believe it does have that as part of its chemical makeup. - Answered by a verified Doctor.