When a client's thyroid panel shows an elevated TSH, the nurse reviews the client's medication history for a current prescription for:
a. Lithium
b. Heparin
c. Aspirin
d. Phenytoin (Dilantin)
ANS: A
THS levels can be elevated as a result of lithium therapy while heparin and aspirin ingestion result in a depression in THS. Dilantin can depress T4 levels.
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