Levothyroxine (T4)
The standard first-line treatment for hypothyroidism, providing synthetic T4 hormone to restore normal thyroid function.
Overview
Levothyroxine is a synthetic form of thyroxine (T4), the primary hormone produced by the thyroid gland. It is the most commonly prescribed thyroid medication worldwide and is considered the gold standard for treating hypothyroidism. The body converts T4 to the more active T3 as needed.
How It Works
Levothyroxine replaces the T4 that an underactive thyroid cannot adequately produce. Once absorbed, T4 enters cells where deiodinase enzymes convert it to T3 (the active form) as needed. This allows the body to regulate its own T3 levels naturally.
Benefits
Potential Side Effects
Dosage Information
Starting dose is typically 25-50mcg daily, taken on an empty stomach 30-60 minutes before breakfast. Full replacement dose averages 1.6mcg per kg of body weight. Regular blood work guides dose adjustments.
Administration
Oral tablet (daily, empty stomach)
Rating
4.5 / 5.0
Category
Thyroid Support
Common Symptoms
Common Questions
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