A client is to be discharged to home after a motor vehicle crash. He is ordered to receive 200 mg of phenobarbital (Luminal) bid for posttraumatic seizures. The drug label states a medication concentration of 20 mg/4 mL
How many mL should be administered to equal the ordered dosage?
a. 20 mL
b. 400 mL
c. 4 mL
d. 40 mL
ANS: D
40 mL is the ordered dosage if 200 mg are required and the concentration is 20 mg/mL.
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