Hello I just took a urine test for a job, and received a call for the lab that I had a positive reading for marijauna. The last time I smoked was january 10th. The test I took was on february 23rd. I was precribed some Doxycycline, Phenazopyridine, & Acetaminophen/codine, a while back that I stopped taking when I started felling better,but jus recently begin to take again, because the symtoms started to reoccur. I felt nausiated when I took the medicine with the codine, so I started taking ibuprofen 200mg for pain.