I have been off carbamozole for 3 weeks as my t4 has gone from 65 to less than 6 ( don t know exactly as had the blood tests then was still on the meds for another 2 weeks till I seen the consultant) I still feel tired all the time have no energy and feel bloated with puffy eyes. I am due another blood test this week but the consultant was expecting me to be showing signs of over active by this point but I am no different . How long do they start to show signs of leaving your system. By the way I was only taking carbamozole for 6 weeks. I was just hoping to start feeling a bit normal