Endocrine System Home > Levothyroxine
Levothyroxine is a prescription drug licensed for the treatment of hypothyroidism and other thyroid problems. It works by increasing certain thyroid hormones in the body. Although most people tolerate levothyroxine well, side effects can include things such as hair loss, insomnia, and heart palpitations. The drug comes in tablet form and is taken once a day, typically in the morning.
What Is Levothyroxine?Levothyroxine sodium is a prescription thyroid medication. It is actually a synthetic version of a naturally occurring thyroid hormone. Levothyroxine is approved to treat an underactive thyroid (known medically as hypothyroidism). It is also approved for the treatment of a variety of other thyroid problems, including certain types of thyroid cancer.
Side Effects of LevothyroxineAs with any medicine, side effects are possible with levothyroxine. However, not everyone who takes the drug will experience side effects. In fact, most people tolerate it quite well. Serious side effects are less common.
- Hair loss (see Levothyroxine and Hair Loss)
- Feelings of a rapidly or forcefully beating heart (known as heart palpitations)
- High blood pressure (hypertension)
- Rapid heart rate (tachycardia)
- Insomnia (see Levothyroxine and Insomnia).