Medically reviewed by Kelly Wood, MD Key Takeaways High TSH levels can mean you have an underactive thyroid or a pituitary gland tumor.Low TSH levels can mean you have an overactive thyroid or issues ...

Please provide your email address to receive an email when new articles are posted on . Of adults receiving levothyroxine therapy for hypothyroidism, 43.8% had either low or high TSH levels. TSH ...

Levothyroxine is a common medicine used to treat thyroid problems. In fact, it’s one of the most prescribed drugs in the United States. Many people have a thyroid condition called hypothyroidism, ...