I had a minor allergic reaction to morphine recently when I was in the hospital (car accident). I am experiencing a similar reaction to the oxycodone (percoset). I am going to an allergist soon to test for some specific environmental, food and drug reactions. Can anyone tell me what if any ingredient (s) are in both morphine and oxy so I can be sure to ask to be tested for that?? It would be extremely helpful. Thanks!