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Synthroid
February 2002

Q. I am currently taking Synthroid for my underactive thyroid and have been taking it for about five years. I would like to know if there are any serious side effects of this medication because I have recently found out that it has not been approved by the FDA. I am seriously thinking of having my prescription changed as soon as possible to reduce the risks of any serious side effects. Please inform me of any serious side effects you know of.

A. Synthroid is a synthetic chemical identical to thyroid hormone that is naturally produced. The thyroid regulates metabolism and affects all organ systems in the body. Underactive thyroid (hypothyroid) is a common medical condition that is diagnosed by a blood test, and causes symptoms such as fatigue, weight gain, dry skin and hair, constipation, and more. Once the diagnosis is made, treatment is accomplished by giving thyroid hormone replacement. Synthroid is one such brand of the hormone and has been on the market and FDA approved for many years.

http://www.nlm.nih.gov/medlineplus/ency/article/000353.htm

http://www.users.fast.net/~sttaylor/hypothyroid.html

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