Dosage Calculation RN Fundamentals Online Practice Assessment 3.0

A nurse is preparing to administer codeine 20 mg PO every 6 hr PRN pain. Available is codeine oral solution 10 mg/ 5 mL. How many mL should the nurse administer per dose? (Round to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) - Answer: 10 mL Follow these steps for the Ratio and Proportion method of calculation: Step 1: What is the unit of measurement the nurse should calculate? mL Step 2: What is the dose the nurse should administer? Dose to administer = Desired 20 mg Step 3: What is the dose available? Dose available = Have 10 mg Step 4: Should the nurse convert the units of measurement? No Step 5: What is the quantity of the dose available? 5 mL Step 6: Set up an equation and solve for X. Have/Quantity = Desired/X 10 mg/ 5 mL = 20 mg/ X mL X mL = 10 mL Step 7: Round if necessary. Step 8: Determine whether the amount to administer makes sense. If there are 10 mg/5 mL and the prescription reads 20 mg, it makes sense to administer 10 mL. The nurse should administer codeine oral solution 10 mL PO every 6 hr PRN pain. A nurse is preparing to administer eszopiclone 2,000 mcg PO to a client. How many mg should the nurse administer? (Round to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) - Answer: 2 mg Follow these steps for the Ratio and Proportion method of calculation: Step 1: What is the unit of measurement the nurse should calculate? mg Step 2: What is the dose the nurse should administer? Dose to administer = Desired 2,000 mcg Step 3: What is the dose available? Dose available = Have 1 mg Step 4: Should the nurse convert the units of measurement? Yes (mcg does not equal mg) 1,000 mcg/1 mg = 2,000 mcg/X mg X mg = 2 mg Step 5: Round if necessary. Step 6: Determine whether the amount to administer makes sense. If the prescription reads 2,000 mcg and 1,000 mcg equals 1 mg, it makes sense to administer 2 mg. The nurse should administer eszopiclone 2 mg PO.