Feeling great is not on the list of symptoms for a thyroid imbalance. I wish it was. :)
RxList - Synthroid...
"Synthroid FDA Prescribing Information: Side Effects
Adverse reactions associated with levothyroxine therapy are primarily those of hyperthyroidism due to therapeutic overdosage (see PRECAUTIONS and OVERDOSAGE). They include the following:
General: fatigue, increased appetite, weight loss, heat intolerance, fever, excessive sweating;
Central nervous system: headache, hyperactivity, nervousness, anxiety, irritability, emotional lability, insomnia;
Musculoskeletal: tremors, muscle weakness;
Cardiovascular: palpitations, tachycardia, arrhythmias, increased pulse and blood pressure, heart failure, angina, myocardial infarction, cardiac arrest;
Gastrointestinal: diarrhea, vomiting, abdominal cramps and elevations in liver function tests;
Dermatologic: hair loss, flushing;
Endocrine: decreased bone mineral density;
Reproductive: menstrual irregularities, impaired fertility.
Pseudotumor cerebri and slipped capital femoral epiphysis have been reported in children receiving levothyroxine therapy. Overtreatment may result in craniosynostosis in infants and premature closure of the epiphyses in children with resultant compromised adult height.
Seizures have been reported rarely with the institution of levothyroxine therapy.
Inadequate levothyroxine dosage will produce or fail to ameliorate the signs and symptoms of hypothyroidism.
Hypersensitivity reactions to inactive ingredients have occurred in patients treated with thyroid hormone products. These include urticaria, pruritus, skin rash, flushing, angioedema, various GI symptoms (abdominal pain, nausea, vomiting and diarrhea), fever, arthralgia, serum sickness and wheezing. Hypersensitivity to levothyroxine itself is not known to occur."
What are your actual thyroid hormone levels? Without seeing those, it's impossible for us to even hazard a guess, since many of the symptoms you listed are also those of hypothyroidism.
While it's possible to get those side effects from Synthroid, it's pretty rare, and to have been this long (since 2001) and not had a single one of those doctors recognize over medication, or allergic reaction, would be almost unheard of.
Have you ever been tested for Hashimoto's Thyroiditis?
yes you need to post your tsh free t3 and free t4 blood test results and ranges from blood test . your dr will give you a copy upon request. that will tell if you needed meds or not and if you are too much . and how often did you change meds, did you dr wait 6 weeks between dosage and blood testing. I have read it takes a year to get regulated for some people. I am still trying to .
But I will say sweating can be from imbalance of hormones, thyroid meds, blood pressure, etc. Since hormones like estrogen play a roll in thyroid too, may need to get that dr to look at your thyroid with your other hormone dosages. You could have a imbalance of vitd3 shortage, b 12, which is common also. But post your blood test....I feel for you>
I had sweats like that going through menopause when I had a imbalance of progesterone and estrogen. I also had shortages of vitd3, b12, dhea , etc. but the hormones caused the sweats. I saw a bio identical dr for that and they also looked at my thyoid as well.
Have you been checked for Fibromyalgia? I suffer from it and I have excessive sweating since I started to take Levothyroxine (Synthroid). Symptoms of Fibromyalgia are pain, fatigue, anxiety and lack of sleep. It is a vicious circle as one symptom influnces the others. If you sleep badly, then you start to feel more pain, which then causes anxiety, etc...
I was taking xanax for anxiety and it was pretty efficient, but had to stopo due to addiction.
It would be worth to see a specialist.
Many symptoms of Fibromyalgia, such as pain, fatigue anxiety and lack of sleep are the same as those of hypothyroidism and will be alleviated or greatly reduced if you're on adequate amounts of thyroid hormones. I had them all when I was very hypo, but when my thyroid levels got where I needed them, my symptoms went away... Whenever my thyroid levels are off, the symptoms come back, but go away when thyroid med is properly adjusted again...