Hello kaylindmer, There are many such drugs. phenylephrine hydrochloride is the commonest medication present
in many anti cold and flu combinations which will fail a drug urine test. There are many cough syrups
containing codeine and other pain medications with morphine group in it. Whether your drug screen turns up
positive for opiates depends on what medications you take, and how much is in your system at the time of the
test. There are many steroids as in oral contraceptives and other combinations which will make your urine test
fail. Discuss with your physician before going for the test. Take care!