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How does Synthroid (levothyroxine) treat goiters?

Synthroid (levothyroxine) treats goiters by reducing the levels of thyroid stimulating hormone (TSH, also called thyrotropin). TSH is produced in the pituitary gland, and it makes the thyroid gland produce more hormones. TSH stimulates the growth of thyroid cells, which can enlarge the thyroid gland and result in a goiter. Lowering TSH levels has the opposite effect, thereby reducing the size of goiters.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.