Can a high dose of Synthroid (thyroxine) do harm to the body?

If excessive . Some people need a higher than average dose to keep the thyroid hormone levels normal, but in excess, i.e. If the thyroid hormone levels are high, it can cause an irregular heartbeat and can lead to early osteoporosis.
Yes. Would give you the same effects as being hyperthyroid; palpitations, heart rhythm problems, anxiety and nervousness just to name a few.

Related Questions

Is 200mcg of thyroxine a high dose (I've had total thyroidectomy)?

Thyroxine dose. This dose is average. It depends upon age and body weight. Your doc will monitor Total T4, freeT4, TSH levels to optimize. . Read more...

I am currently on a high dose of thyroxine (250mcg). I do not have any symptoms of hyperthyroidism. Should I be concerned by this high dose?

Follow your TSH . Replacement of thyroid hormone in patients with hypothyroidism is usually monitored by checking labwork -- TSH and free T4 levels. Usual intervals for checking would be about every three months. If it's been a while since you've had yours checked, you should see a doctor to discuss this. The actual dose is not important, the goal is to have your labwork in the right range. Read more...
Depends on your TSH. Some patients require higher doses of medications. Your physician should monitoring your thyroid function via blood tests (tsh). Typically, a TSH is checked 6-8 weeks after starting a new dose and at least once a year once your dose is stable. If you have a lot of weight loss or gain you may need rechecked as well. If your TSH is in a good range then you need that high of a dose. Read more...

Ws hypothyroid (TSH 4.5).With synthroid, (thyroxine)my TSH is 0.03 and FT4=2.3.Dose reduced. If I conceive now, wht r the harm to baby? Is it different than Grave's?

Dose should be cut. Your hypothyroidism was borderline with TSH of 4.5 but most would recommend treatment if you are pregnant to get TSH below 3. However the dose of thyroid hormone you were given was too high so now you are mildly hyperthyroid. Don't think it will harm the baby but dose should be reduced to bring your FT4 below 1.8 and your TSH up to the 0.5-3 range. Read more...

If I miss my Synthroid (thyroxine) 125 mg over the weekend because I forgot to pick up my meds on friday and don't pick them up until monday will it do any harm?

No. I don't think it will if it's only for few days onetime only. But if you do this frequently then it will.When you go back home take an extra half tablet for 2 days. Read more...

I have hypothyroidism I am on Synthroid (thyroxine) my levels are not normal yet, but wanted to know if I can get pregnant and if the Synthroid (thyroxine) will harm the bab?

Nope. . Synthroid (thyroxine) will not harm the baby, but people with uncontrolled hypothyroidism will likely have a hard time getting pregnant anyways, so see your doc about getting your thyroid fixed.... Read more...
Low synthroid (thyroxine) is bad. Synthroid (thyroxine) is a natural hormone that is replacing what your thyroid gland is not making. Yes you can get pregnant, but not until thyroid is normal. Pregnancy generally requires a boost in your synthroid (thyroxine) levels. Hypothyroidism ( low synthroid (thyroxine) dose) is very bad for the developing fetus. Talk to your doc before conceiving. Read more...