A patient is admitted to the unit for vitamin B12 deficiency. Which clinical finding would the nurse monitor in a patient taking cyanocobalamin for treatment of pernicious anemia?
a. Hyperkalemia
b. Hypokalemia
c. Hypocalcemia
d. Hypercalcemia
ANS: B
Hypokalemia may occur as a natural consequence of increased erythrocyte production. As large numbers of new erythrocytes are produced, levels of free potassium may fall, resulting in hypokalemia.
Hypokalemia, not hyperkalemia, may occur as a consequence of increased erythrocyte production.
Monitoring of calcium is not indicated.
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