yes, you need to talk to your P-doc as it could interact with your meds (and your body in general). If you don't need it (your body already makes it) then you could end up with an overdose, etc. It's not something that one messes with alone, without doctor's advice, as it can throw off "everything" else and make you very/mysteriously sick:

http://www.nutritional-supplement-ar...-Tyrosine.html