Levothyroxine: What Are The Possible Side Effects Of Levothyroxine

What is the most important information I should know about levothyroxine?
What is levothyroxine?
What should I discuss with my healthcare provider before taking levothyroxine?
How should I take levothyroxine?
What happens if I miss a dose?
What happens if I overdose?
What should I avoid while taking levothyroxine?
What are the possible side effects of levothyroxine?
What other drugs will affect levothyroxine?
Where can I get more information?

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What are the possible side effects of levothyroxine?

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Stop using levothyroxine and get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

headache;
sleep problems (insomnia);
nervous or irritable feeling;
fever, hot flashes, sweating;
changes in your menstrual periods;
appetite changes, weight changes;

Less serious side effects may include mild hair loss.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.

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Last updated:	September 12, 2008

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