Neck and chest palpitations when lowered thyroid dose

[Turo22]

For 30 years I've been on synthroid (levothyroxin) ; most of those at 125 mcg.

My doctor told me to lower it to 115. For 2 weeks now I've been on 115, and in the past week started have major palpitations, mostly in my neck, and vibrating to my chest. It just occurred to me that it may be be related to my thyroid. However, I presumed the palpitations would come if increasing the dose, not lowering it. Could it be logical that the pounding in my throat means my thyroid is looking for more meds?

[greygoose]

Your thyroid doesn't look for meds. The levo you take doesn't have any effect on the thyroid. It's not trying to repair the thyroid. It's just thyroid hormone replacement, replacing the hormone your thyroid can no-longer produce.

However, being under-medicated, can cause all sorts of symptoms - including palpitations. Why did your doctor lower your levo? Do you have a copy of your results?

[humanbean]

Feelings of vibration in the body are often associated with low or high cortisol. If you are under-medicated the body may try to compensate with more cortisol. If your body can produce more cortisol, then too much cortisol causes problems. If your body needs more cortisol but can't produce it for some reason then that causes symptoms as well.

I would suspect you are under-medicated now. TSH (Thyroid Stimulating Hormone) is not a good indicator of thyroid health. Apart from anything else, TSH is produced by the pituitary, not the thyroid.

You can also get lots of symptoms from low nutrient levels. The basic ones that are often deficient in people on this forum are vitamin B12, vitamin D, folate and ferritin/iron. If you could get these tested, and a full/complete blood count as well, then optimising your nutrient levels will help you feel better.