RECOMENDED BLOOD TESTS-SURGERY-FATIGUE

A year ago I had back surgery, was on moriphine drip for a week as well as many other drugs. Since then I have been in a rut, body is tired and digestion is poor. I would like to get a full blood work done as well as t-levels checked but dont know what tests to tell my dr. What tests should I have done. Am concerned with my liver do to all the meds I was on and past roid use.