I Have Taking Oxycodone /apap 7.75 325 Mg . I

I have taking oxycodone /apap 7.75 325 mg . I had t back surgery on Aug. 31. I am having a rash told my doctor about the etching and he said that some time after you have been on meds. for a long as I have ,this sometimes happens. I found some prednisone that my regular dr, gave me when I had a streroid shot done ycodoneand yhet used dry that I was not aware of. This prednisone was used for a rash from that. I wanted to know if I would take this would it be ok with oxycodone. Are should I wait until Monday I will see my skin dr at 9 am. the rash id driving me crazy. I got this prednisone on 3/22/2014