Hi,dr.Andrew,i ve been diagnos of Hyperthyroidism.My doctor said that my health is not yet ready to hve operation,my TSH is Low,and my T4 is high,evry month i performed test,a blood sample,im already upset,because the result made no difference,she gave me PTU and Propanolol,over a year usuing it,I d found out that my goiter is larger than before,.Can i used the prescriptive drugs over lifelong?tnx