Why Isn't Your Synthroid Working?

I frequently hear from readers who are starting on thyroid treatment, and are frustrated. The email will say: "Help! My Synthroid isn't working! What should I do?" Often, the patient started Synthroid three or four weeks earlier, and is still exhausted and gaining weight. So her first thought is that the Synthroid must not be t working.

It's actually a common misconception. Patients think that the medication isn't working if after a few weeks, they still have troublesome symptoms. But if this happens to you, does this mean your thyroid medication -- and Synthroid is the brand name levothyroxine drug most often prescribed for thyroid patients -- isn't working?

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