Dosage Calculation Practice Worksheet 4

1). You have on hand enoxaparin (Lovenox) 30 mg/0.3 mL. You need to administer 1 mg/kg SC. Your patient weighs 200 pounds. How much will you draw into a syringe? Answer: 0.9 mL 2). Amoxil (amoxicillin) suspension 180 mg PO bid is ordered for a patient who cannot swallow pills. It is supplied as 125 mg/5 mL. How many milliliters should you administer? Answer: 7.2 mL 3). Heparin sodium, 1000 units/hour IV, is ordered for a patient with a blood clot in the leg. It is supplied as 50,000 units in 500 mL of dextrose and water. How many milliliters per hour should be set on the controller? Answer: 10 mL/hour 4).Diltiazem (Cardizem) 90 mg PO tid is ordered for a patient with hypertension. It is supplied in 60 mg scored tablets. How many tablets should you administer? Answer: 1.5 tablets 5). Atropine 0.6 mg IM is ordered preoperatively. It is supplied as 0.4 mg/mL. How many milliliters should you administer? Answer: 1.5 mL 6). Morphine sulfate 2 mg IV push is ordered to relieve shortness of breath in a patient with chronic lung disease. It is supplied as gr 1/6 per mL. How many milliliters should you administer? Answer: 0.2 mL 7). Each acetaminophen (Tylenol) #3 tablet has 325 mg of acetaminophen and 30 mg codeine. A patient is told to take 2 tablets PO every 4 hours for pain. The maximum safe dose of acetaminophen is 4 g/day. The safe dose of codeine varies with tolerance. Is the dose safe? Answer: 3.9 g per day is what the patient is receiving and the maximum safe dose per day is 4g so the dose is safe 8). Phenobarbital is supplied as 60 mg/mL. You need to administer 160 mg IV stat. How many milliliters should you administer? Answer: 2.7 mL 9). A patient is receiving 250 mL normal saline IV over 4 hours, using tubing with a drip factor of 10 drops/mL. How many drops per minute should be delivered? Answer: 10 gtts/min 10). Cephazolin 1 g IV is ordered three times a day for a patient with pneumonia. It is supplied in 100mL dextrose and water, to run over 20 minutes. How many milliliters per hour should you set the controller to deliver? Answer: 300mL/hour 11). Your order reads ceftizoxime 1g IV piggyback (IVPB) every 8 hours. The pharmacy supplies it in 100 mL D5W. You need to infuse it over 30 minutes. Using gravity drip tubing with a drop factor of 10, how fast will you run the piggyback? Answer: 33 gtts/min 12). You need to infuse 1000 mL of NS IV over 6 hours. How many milliliters per hour do you set on the IV infusion controller? Answer: 17 mL/hour 13). You have an order for fosphenytoin (Cerebyx) 100 phenytoin equivalents (PE) IVPB qid. It arrives in 50 mL of normal saline, with a note on the piggyback bag not to infuse faster than 150PE/minute. How many milliliters per hour should you set on the controller? Answer: 4500 mL/hour maximum rate 14). You have 500 mL of lipids on a second IV infusion controller to piggyback into a primary hyper-alimentation line. You want to run the infusion over 24 hours. At what rate should you run the lipids? Answer: 21 mL/hour 15). You have an order for 500 mg vancomycin IVPB every 6 hours for a patient who weighs 120 lbs. You know that you can safely administer up to 40 mg/kg/day. Is the order safe? Answer: Yes the patient is receiving 36.7 mg/kg/day 16). You have 350 mL packed red blood cells that you want to infuse IV over 2 hours. There is no controller available. Your blood tubing delivers 10 gtts/mL. How many drops per minute should you set? Answer: 29 gtts/min 17). You need to infuse corticotropin (Acthar) 25 U in 500 mL D5W IV over 8 hours. How many milliliters per hour do you infuse on a controller? Answer: 63 mL/hour 18). A patient is taking acetaminophen (Tylenol) 325 mg, 2 tablets PO every 6 hours. How many grams is the patient receiving in 24 hours? Answer: 2.6 g 19). You have an order for diphenhydramine hydrochloride (Benadryl) 40 mg IM ASAP. You have on hand Benadryl 25 mg/mL. How many milliliters do you prepare? Answer: 1.6 mL 20). You have digoxin (Lanoxin) 0.25 mg tablets, and you need to administer 0.375 mg PO. How many tablets should you administer? Answer: 1.5 tablets