Key facts

A hormone called thyroxine has a synthetic equivalent called levothyroxine. It prevents the signs of hypothyroidism and replaces thyroxine if your thyroid gland is unable to produce it.

Although levothyroxine begins to work right away, it might take a few weeks before your symptoms start to get better.

Levothyroxine side effects are most frequently brought on by taking more of the medication than is necessary. To help lessen any side effects, your doctor may reduce your dose.

Your doctor will perform a blood test prior to you beginning to take levothyroxine. As soon as you begin taking the medication, you will undergo routine blood tests to determine how well it is working.

During pregnancy, levothyroxine doses must be carefully monitored. If you intend to become pregnant or suspect you may be pregnant, you should consult with your doctor to ensure that you and your baby receive the best possible care.