Synthroid Gives You What Your Thyroid Can't
SYNTHROID (levothyroxine sodium tablets, USP) is a prescription synthetic thyroid hormone that is used to treat a condition called hypothyroidism. It is intended to replace a hormone that is normally produced by your thyroid gland, helping to restore your thyroid hormone balance. Generally, thyroid replacement medication is to be taken for life.
Before taking Synthroid, notify your physician of any other medical conditions you may have, particularly heart disease, diabetes, clotting disorders, previous thyroid disease, and adrenal or pituitary gland problems; if you are pregnant, intend to become pregnant, or are breast-feeding; or if you are taking medications, including blood thinners.
Tell your doctor if you are taking other prescription medications or over-the-counter products. Tell your doctor if you begin or stop taking other medications while taking Synthroid. Some drugs may interact with Synthroid.
12 precise dosage strengths
The American Association of Clinical Endocrinologists recommends keeping the thyroid-stimulating hormone (TSH) level between 0.3 and 3.0 mIU/L. Your doctor may determine a different range is right for you. Every patient is unique and may require a different amount of levothyroxine to keep thyroid hormones in balance.
You will need to work with your doctor to find the dose that is right for you. This means office visits for lab tests, especially during the first months of treatment.
For example, some people still have some thyroid function and may only need a low dose of Synthroid to replace the amount of thyroid hormone that is missing, while others don't have much thyroid function and need a higher dose of Synthroid. And over time, your thyroxine needs can change, which means your dose of Synthroid may need to change.
Synthroid comes in 12 different dosage strengths to give your physician the ability to prescribe the exact amount of levothyroxine your body needs.
Precise dosage is important because Synthroid is a narrow therapeutic index drug, which means if your dosage changes even a little bit, it can change your TSH level and cause symptoms.
1. AACE Thyroid Task Force. American Association of Clinical Endocrinologists medical guidelines for clinical practice for the evaluation and treatment of hypothyroidism and hyperthyroidism. Endocr Pract. 2002;8:457-469.
2. Food and Drug Administration. Approved Drug Products with Therapeutic Equivalence Evaluations (Orange Book); 30th ed. 2010. Available at: http://www.fda.org Accessed March 1, 2013.