Serum lithium level is important to monitor because it has a narrow therapeutic range. What is the reference (therapeutic) range?
a. 0.5 to 1 mEq/L
b. 0.5 to 1.5 mEq/L
c. 1.5 to 3 mEq/L
d. 2 to 2.5 mEq/L
ANS: B
The normal maintenance serum level for lithium is 0.5 to 1.5 mEq/L.
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