A child weighing 45 pounds is prescribed phenytoin for a dysrhythmia. The nurse calculates the maximum dose for this child, if the dose is not to exceed 15 mg/kg/dose
a. 300 mg/dose c. 245 mg/dose
b. 308 mg/dose d. 200 mg/dose
ANS: B
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A Incorrect: This is not the appropriate dosage.
B Correct: 45 pounds divided by 2.2 = 20.5 x 15 = 307.5 mg/dose
C Incorrect: This is not the appropriate dosage.
D Incorrect: This is not the appropriate dosage.
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