is it possible for a therapeutic overdose of synthroid to cause weightloss? . i have been on synthroid/levothyroxine for years. over the past year i lost (on purpose) 45 pounds. now i cannot maintain my weight. i have increased my calories by half and still am losing weight. could this be because my synthroid dose is no longer appropriate for my weight?
also if you are losing too much weight (some loss will happen) then your doctor needs to change your dosage or try a new medicine for you.