Drug interactions

Patient: Hi, I had been diagnosed with Adult onset Stills disease in early 2010 and it’s been cured with methotrexate and prednisone, i’ve stopped taking these medicine in august 2010 and some chinese doctors prescribed me some natural herbal medication for me which supposed to restore liver functions and prevent onset of disease. I want to ask whether L carnitine supplements would interact with those herbal medicines (i don’t know the ingredients in those herbal medications but it is all made out of natural herbs). Thank you