A patient has taken lithium (Lithane) 600 mg three times daily for 1 week. A laboratory result in which range shows that the desired serum lithium level was achieved?
a. 0.2 to 0.6 mEq/L
b. 0.6 to 1.2 mEq/L
c. 1.2 to 2 mEq/L
d. 2 to 2.6 mEq/L
B
Therapeutic serum lithium levels are 0.6 to 1.2 mEq/L. The other options are either too low or too high. Serum levels above 1.5 mEq/L can cause symptoms of toxicity.
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