I was presently prescribed prednisone yesterday for inflammation in my lungs. Today was my first day taking my first dose which was around 6pm. At around 1am I took 2 acetaminophen/codeine 300mg/3mg which I was proscribed a few months ago for a torn MCL. I had never finished the bottle but last night I twisted my knee and have been in excruciating pain since. (All I want to do is sleep) so I took the 2. It has been about 7 hours since I took the prednisone . I know these two can tear the stomach up but I just want to make sure I'm okay as of right now. I do not like mixing drugs nor do I plan on taking both at the same time again. I just needed pain relief for the night. Tomorrow if my last day on prednisone so I won't have to worry about the combination again. Just looking for some reassurance (since I tend to be a hypochondriac when it comes to medicine) that I'm going to be okay doing that this evening.