In assessing a patient before administration of a cardiac glycoside, the nurse knows that which lab result can increase the toxicity of the drug?
a. Potassium level 2.8 mEq/L
b. Potassium level 4.9 mEq/L
c. Sodium level 140 mEq/L
d. Calcium level 10 mg/dL
ANS: A
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