Levothyroxine is used to replace the hormone that is normally produced by the thyroid gland for a condition known as hypothyroidism. It is important to have adequate levels of thyroid hormone in your bloodstream in order for various organ systems in your body to function properly. This medication is used to treat other types of thyroid disorders as well (e.g., certain types of goiters, thyroid nodules, thyroiditis, and thyroid cancer).
Side Effects
Symptoms of low thyroid levels include fatigue, muscle aches,constipation, dry skin, weight gain, slow heart rate, sensitivity to cold, or dry brittle hair that tends to fall out easily. These symptoms should disappear as your body adjusts to the medication. If they persist or become bothersome, notify your doctor promptly.Headache, nervousness, trembling, sweating, increased appetite, diarrhea, weight loss or insomnia may occur. If any of these effects persist or worsen, notify your your doctor promptly. In rare instances, some hair loss may occur during the first few months of starting this drug. This effect is usually temporary as your body adjusts to this medication. If this effect persists or worsens, notify your doctor promptly. Tell your doctor immediately if you have any of these unlikely but serious side effects: chest pain, rapid or irregular heartbeat, shortness of breath. Tell your doctor immediately if you have any of these very unlikely but serious side effects: seizures. An allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of an allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.
