While once a common practice, the current guidelines do not suggest "suppression" of nodules with levothyroxine (ie synthroid). This is provided that you had a normal baseline TSH level and have not had external beam radiation to the neck for other treasons (which increases the risk of thyroid cancer).
The first step with a nodule is usually consideration for biopsy.
If the thyroid function (TSH) is normal to start with, we usually do not use medications like synthroid to "shrink" the nodule. There are some exceptions -- ie, history of radiation exposure, prior surgery for thyroid cancer or borderline high TSH (eg >3). Would consider endocrine opinion -- although many still would give meds for a nodule, the current guidelines do not support routine use of synthroid in this way.
I had a biopsy 2 weeks ago and this is what he suggested ... I would take the synthroid for 4 months to shrink the thyroid nodule and i will take another thyroid function test and thyroid level test and we will go from there the last thryoid function and level test suggested i get a biopsy in the first place ......should i be seeing an endocrinoligist...because my primary care doctor refered me to an ENT docter and he is the one who put me on the synthroid......my original complaint to my dr. was i was having trouble swallowing and i was very fatigue and my legs and ankles ached from a lying or sitting position to standing and walking.......i just feel not sure of my doctors choices...