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What is levothyroxine used for?
Plain Language Summary Hypothyroidism, a reduction in thyroid hormone levels, is one of the most common diseases worldwide. The medication most used to treat hypothyroidism is levothyroxine, a compound that acts as a replacement for a person's thyroid hormone.
Is it safe to take thyroid hormone with levothyroxine?
Thyroid hormone should not be used to treat obesity in patients with normal thyroid function. Levothyroxine is ineffective for weight reduction in normal thyroid patients and may cause serious or life-threatening toxicity, especially when taken with amphetamines. Talk to your doctor about the potential risks associated with this medication.
How long does it take for levothyroxine to work?
How long does it take for levothyroxine to work?
It may also be used to treat and prevent certain types of thyroid tumors. It is not indicated for weight loss. Levothyroxine is taken by mouth or given by intravenous injection. Maximum effect from a specific dose can take up to six weeks to occur.
What are the side effects of too much levothyroxine?
What are the side effects of too much levothyroxine?
Too high a dose of levothyroxine causes hyperthyroidism. Overdose can result in heart palpitations, abdominal pain, nausea, anxiousness, confusion, agitation, insomnia, weight loss, and increased appetite.
How do I know if my dose of levothyroxine is sufficient?
You can do this by ordering Free T3, Free T4 and Total T3 (9). These lab tests provide a window into your body and can help you determine if your dose is sufficient. The hallmark of hypothyroidism is a reduction in Free T4 and an elevation in TSH (typically, but not always the case). As you take Levothyroxine your Free T4 should increase.
What is the maximum dosage of levothyroxine for hypothyroidism?
In severe cases of hypothyroidism (T4 less than 5 mcg/dL), a higher initial dose of 12 to 17 mcg/kg/day may be considered. For chronic or severe hypothyroidism: 25 mcg orally once per day and increase dosage as needed in increments of 25 mcg every 2 to 4 weeks until the desired effect is achieved.