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Author: Admin | 2025-04-28
The table below highlights the basics of levothyroxine’s dosage for adults. Doses are listed in micrograms (mcg), and some are in mcg per kilogram (mcg/kg) of body weight. For reference, 1 kg is about 2.2 pounds (lb).Keep reading for more details about levothyroxine’s dosageWhat is levothyroxine’s form?Levothyroxine is available as an oral tablet.What strengths does levothyroxine come in?Levothyroxine comes in 12 strengths:25 micrograms (mcg)50 mcg75 mcg88 mcg100 mcg112 mcg125 mcg137 mcg150 mcg175 mcg200 mcg 300 mcgWhat are the usual dosages of levothyroxine in adults?Your dosage will depend on your specific situation. Your doctor may start you on a low dosage and adjust it over time to reach the right amount for you. They’ll ultimately prescribe the smallest dosage that provides the desired effect. The information below describes dosages that are commonly used or recommended. In some cases, doctors may adjust your dosage from those shown below. But be sure to take the dosage your doctor prescribes for you. They’ll determine the best dosage to fit your needs. Dosage for hypothyroidismThe levothyroxine dosage for adults with hypothyroidism may depend on the following factors:your ageyour weightother medications you take foods you eatother medical conditions you have, especially heart problemsyour thyroid hormone levels If you’ve received the diagnosis of hypothyroidism recently, your doctor will prescribe a starting dosage. It’s usually 1.6 mcg/kg of body weight to be taken once daily. This is also known as the average dose. For example, if you weigh 70 kg (about 154 lb), your likely starting dosage will be 100 to 125 mcg to be taken once daily. (In comparison, a dosage of 25 mcg, 50 mcg, or 100 mcg once daily would not be considered a high dose.)Your doctor will check your thyroid levels every 4 to 6 weeks. If needed, they’ll adjust your dose in increments of 12.5 to 25 mcg.For some people, doctors will prescribe a lower starting dosage. This is usually 12.5 to 25 mcg to be taken once daily. These include people who:have had hypothyroidism for a whilehave hypothyroidism and a heart conditionare older adults (ages 65 years and older) with hypothyroidism and a heart conditionIf you’ve had hypothyroidism for a while, your doctor may adjust your dose every 2 to 4 weeks. If you’re an older adult or have a heart condition, your doctor may adjust your dose every 6 to 8 weeks.Dosage for thyroid cancerFor adults with thyroid cancer, in certain
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