I have been taking Roxys 30 for about two years. I get ramdomly tested at my doctors office and have never had an issue as I do not take any other medication. I did take MS Contin on a Friday, and was tested the next Wedesday. I failed the test by testing positive for morphine. I thought the MS contin would be out of my system in 2 to 3 days. Am I wrong? I am going to talk to my doctor this week but I do not know what to say as I did nothing else to make my fail this test. Is it possible that the ms contin was still in my system? Thanks in advance guys.

PS> The MS Contin was perscribed to me a while back and I took it when I ran out of my Roxys. I did explain this to my doc already but I want to know why this happened.