Synthroid (levothyroxine) is a synthetic T4 hormone used to treat hypothyroidism. Synthroid is the most common form of thyroid hormone replacement therapy. It’s important to take Synthroid as prescribed by your doctor in order to maintain a healthy thyroid gland and metabolism.
Synthroid may cause a variety of side effects. The most common are headaches, dizziness, anxiety, diarrhea, and upset stomach. More serious side effects include chest pain, irregular heartbeat, shortness of breath, and increased appetite. If you experience any of these side effects, contact your doctor immediately.
Synthroid can interact with a variety of other drugs and supplements. Be sure to tell your doctor about all the medications you’re taking, including over-the-counter drugs, vitamins, and herbal supplements. Synthroid should not be taken within four hours of taking calcium or iron supplements.
Synthroid is available in tablets of 25 mcg, 50 mcg, 75 mcg, 88 mcg, 100 mcg, 112 mcg, 125 mcg, 137 mcg, 150 mcg, 175 mcg, and 200 mcg. The usual starting dose is 50-125 mcg per day. Your doctor will adjust your dose based on your TSH levels.
If you miss a dose of Synthroid, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.
Synthroid should be stored at room temperature, away from light and moisture. Keep Synthroid out of the reach of children and pets.
How does Synthroid work?
Synthroid works by replacing the thyroxine hormone that is normally produced by the thyroid gland. Synthroid replaces the hormone in people who have had their thyroid gland removed or who have hypothyroidism, which is a condition where the thyroid doesn’t produce enough of the hormone. Synthroid also treats goiters, which are enlarged thyroid glands. Synthroid works by replacing the thyroxine hormone that is normally produced by the thyroid gland.