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What if Your Synthroid Doesn't Work?

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Updated July 12, 2007

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Are you taking the right dose of your thyroid medication?
Not enough -- or too much -- can both cause a variety of symptoms, including fatigue, weight changes, and mood swings, among others. Your doctor will probably use the TSH test to determine your response to the medication. Be sure you understand the TSH normal range your doctor and laboratory are using. Often, it takes some adjusting to get the right dosage.

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