You have on hand morphine 500 mg in 500 mL normal saline. You need to administer morphine 80 mg/hour in a continuous IV infusion to a patient with terminal cancer pain. How many milliliters per hour will you set on the controller?
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Solution
\(\frac{80\, mg}{hour}\times \frac{500\, mL}{500\, mg}= 80\, mL/hour\)
Your order reads levothyroxine 100 mg PO every morning. You have levothyroxine 0.05 mg tablets. How many tablets should you administer?
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Solution
\(100\, mcg\times \frac{1\, mg}{1,000\, mcg}\times \frac{1\, tablet}{0.05\, mg}= 2\, tablets\)
Your order reads Zosyn 4.5 g in 100 mL D5W IV over 1 hour. You have microdrip tubing. What drip rate will you set?
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Solution
\(\frac{100\, mL}{1\, hr}\times \frac{1\, hr}{60\, mins}\times \frac{60\, gtts}{1\, mL}= 100\, gtts/min\)
Your order reads ceftizoxime 1 g IV piggyback every 8 hours. The pharmacy supplies it in 100 mL D5W. You need to infuse it over 30 minutes. With a drop factor of 10, what drip rate will you set?
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Solution
\(\frac{100\, mL}{30\, mins}\times \frac{10\, gtts}{mL}= 33\, gtts/min\)
Your order reads cortisone 15 mg PO every morning. You have on hand cortisone 10 mg tablets. How should you prepare the correct dose?
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Solution
\(15\, mg\, units\times \frac{1\, tablet}{10\, mg}= 1.5\, tablets\)
Your order reads ergocalciferol 225,000 units PO daily. You have on hand ergocalciferol in 50,000 unit tablets. How many do you administer?
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Solution
\(225,000\, units\times \frac{1\, tablet}{50,000\, units}= 4.5\, tablets\)
You have on hand ergocalciferol liquid 8000 units/2 mL. Your order reads ergocalciferol 225,000 units PO daily. How should you prepare the correct dose?
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Solution
\(225,000\, units\times \frac{2\, mL}{8,000\, units}= 56\, mL\)
Your order reads labetalol 40 mg IV push every 10 minutes until blood pressure is lower than 140/90 mm Hg. You have labetalol 5 mg/mL available. How should you prepare the correct dose?
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Solution
\(40\, mg\times \frac{1\, mL}{5\, mg}= 8\, mL \)
Your order reads penicillin 1.2 million units IM daily. You have penicillin 500,000 units/mL. How should you prepare the correct dose?
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Solution
\(1,200,000\, units\times \frac{1\, mL}{500,000\, units}= 2.4\, mL\)
You are providing home care for a patient who needs 15 mL of magnesium hydroxide/aluminum hydroxide (Maalox) PO. She has only standard measuring spoons in the house. How do you instruct her to take her dose?
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Solution
\(15\, mL\times \frac{1\, tbsp}{15\, mL}= 1\, tbsp\)