| Collection & Request Instructions: | It is suggested that only TSH is requested. If this is abnormal, FT4 and/or FT3 will be perfomed, as appropriate.
Clinical notes are essential for interpretive comments—especially a record of therapy with thyroxine or anti–thyroid drugs, suspicion of pituitary disease, drug therapy with amiodarone, lithium, phenytoin, etc.—which will permit additional tests as required. |
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