Calculation Problems
(LO 3-7, 3-9) The physician orders meperidine ( Demerol ) 60 mg and hydroxyzine ( Vistaril ) 25 mg IM prn. Available is Demerol 100 mg/2 mL and Vistaril 25 mg/mL. You should administer a total volume of _________ milliliters of Demerol and Vistaril in one dose to the patient. Can you mix the Demerol and Vistaril in one syringe? Hint: Look at a compatibility chart in the medication room or in many drug books to determine if Demerol and Vistaril may be mixed.
Demerol
100X = 120
120 ÷ 100 = 1.2
X = 1.2 mL
Vistaril
25X = 25
25 ÷ 25 = 1
X = 1 mL
Demerol 1.2 mL and Phenergan 1 mL is a combined does of 2.2 mL
Demerol and Phenergan are compatible and may be administered in one syringe.