Helping Keep Thyroid Hormone Balance

Taking the right dose of thyroid medicine, the right way, every day can help to keep your thyroid in balance

Your TSH level is the most sensitive test doctors use to see if the level of a specific thyroid hormone called thyroxine is in balance. When your TSH level is HIGH, it means your thyroxine level is LOW. When your TSH is LOW, it means your thyroxine level is HIGH.

For people taking thyroid medicine, the goal of treatment is to keep your TSH level between 0.3 and 3.0 mIU/L

Keeping your TSH level within this target treatment range can help improve symptoms.


Taking too little levothyroxine can slow down your body's systems.

Taking too much levothyroxine can speed up your body's systems.

Not getting the amount of levothyroxine that your body needs is called underreplacement.

Getting more levothyroxine than your body needs is called overreplacement.

Symptoms of underreplacement

Symptoms of overreplacement

  • Feeling very tired or sluggish
  • Weight gain
  • Dry skin
  • Depression
  • Cold hands and feet
  • Problems with memory and thinking
  • Feeling nervous or jittery
  • Weight loss
  • Anxiety
  • Fast heart beat
  • Sweating too much

Underreplacement can lead to problems with pregnancy, changes in blood cholesterol levels, heart attacks in older women, and other health conditions.

Overreplacement can lead to weak bones, changes in how the heart beats (atrial fibrillation), and other health problems.


Tips to help keep your thyroxine level in balance

Consistent treatment (taking your thyroid medicine exactly as your doctor prescribed) helps add back the precise amount of thyroxine your body needs. These tips can help keep your thyroid in balance.

Take your thyroid medicine the right way every day

Stay with the brand of thyroid medicine your doctor prescribes

Next >> How body changes can impact treatment