I tested positive to cocaine with an itemiser swipe at borellan correctional centre, i take kapanol, lovan, mo?

the prescription medication that I am on is kapanol, lovan, lipitor, moduretic, nexium, panadol osteo, cartia, and this week I have had, 2 only oxazepam 30 mg x2, ansd erythromycin x 4 at 400mg each, will any of these give a positive for cocaine tested by an itemiser.