If you call the pharmacy they should know. Did the doc who prescribed it know about the other meds you are on? I would think that they would have checked before prescribing it. I hope you find out, and I hope the pain meds help!!
__________________
From the movie The Hours: "If I were thinking clearly, Leonard, I would tell you that I wrestle alone in the dark, in the deep dark, and that only I can know. Only I can understand my condition. You live with the threat, you tell me you live with the threat of my extinction. Leonard, I live with it too."