In april i was diagnosed with graves disease iv been on 20mg carbimZole, my endo recently wrote to my gp to lower the dose to 10mg but for sum reason my gp has prescribed me with 3x daily 5mg. As im nieve to sum things i took 15mg a day for 2months & now my thyroid has gone underactive, my symptoms are worse befor i started treatment. Surely the meds we use for over active isnt gna be the same for underactive. I feel as if im gna get really ill if i carry on takin carbimZole now im underactive??