I would like to know how long before the trace of anti-thyrox leaves my body, in order for me to do a proper diagnosis. I started treatment with my tsh showing 0.04 and ft4 showing 40.00 my second tests says tsh 0.03 ft4 19.16 I want to get second opinion to confirm the condition but I took the pills for 3 weeks then stopped for about a week without taking the anti-thyrox my blood results are now showing normal levels of the thyroid hormones. Of both ft3 and ft4 and tsh. please advice.