Well I have problem where I had to take a urine test and for no reason that I can understand the test was straight positive for opiates and benzos. I never took either of them to my knowledge. However, upon my own investigations I found out that someone that gave me some of their prescription Ibuprofen prior to the test was also storing other narcotic pills in the same bottle with the Ibuprofen. Now the Ibuprofen pills he gave me and I took, where most definitely Ibuprofen. so my question is: Can the residues from the narcotic pills getting on the Ibuprofen be enough to show up on a test? Also I was taking the Ibuprofen he gave me for a couple weeks, if that would make a difference. If anyone can help me with this I would greatly appreciate it.