A question about the drug Trazmadone?

My sister is not supposed to take anything with Opiate in it, such as oxycontin, tylox, vicoden, ect, and I saw that she was taking trazmadon, and she said it was for pain, but had no opiate in it, I am worried about her, cause she just did the whole rehab thing and is ssupposedto stay away from narcotic and opiate drugs, so does anybody know whats in that stuff? And is it addicting? Thanks