PHARM Dosage Calculations
A nurse is preparing to administer magnesium sulfate 0.5 g/hr by continuous IV infusion. Available is magnesium sulfate 1 g in 100 mL dextrose 5% in water (D5W). The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest whole number.
50
The same patient is receiving continuous heparin therapy when the new aPTT result comes in. According to protocol, the nurse needs to decrease the infusion rate by 1 mL/hr. How many mL/hr should the nurse administer the infusion? How many units will the patient be receiving in an hour?
7.4; 740
A nurse is preparing to administer packed RBCs 280 mL IV to infuse over 4 hr to a client. The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest whole number.
70
A nurse is preparing to administer magnesium sulfate 0.75 g/hr by continuous IV infusion. Available is 1 g magnesium sulfate in 100 mL dextrose 5% in water (D5W). The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest whole number.
75
A nurse is preparing to administer heparin 10 units/kg/hr by continuous IV infusion to a client who weighs 72 kg. Available is 25,000 units of heparin in 500 mL 0.9% sodium chloride. The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest tenth.
14.4
A nurse is preparing to administer furosemide (Lasix) 40 mg PO in 0.5 oz of orange juice. How many mL of orange juice should the nurse administer? Round to the nearest whole number.
15
A nurse is preparing to administer morphine 2.5 mg IV bolus every 2 hr PRN for pain. Available is morphine injection 10 mg/mL. How many mL should the nurse administer per dose? Round to the nearest hundredth.
0.25
A nurse is preparing to administer epoetin alfa (Epogen) 50 units/kg subcutaneous to a preschooler who weighs 40 lb. Available is epoetin alfa 2,000 units/mL. How many mL should the nurse administer? Round to the nearest hundredth.
0.45
A nurse is preparing to administer cephalexin (Keflex) 500 mg PO every 6 hours. Available is cephalexin 1 g tablets. How many tablets should the nurse administer per dose? Round to the nearest tenth.
0.5
A nurse is preparing to administer meperidine (Demerol) 125 mg subcutaneous every 4 hr PRN for pain. Available is meperidine injection 100 mg/mL. How many mL should the nurse administer per dose? Round to the nearest tenth.
1.3
A nurse is preparing to administer tobramycin (Tobrex) 2.5 mg/kg IM to a preschooler who weighs 20 kg. Available is tobramycin injection 40 mg/mL. How many mL should the nurse administer per dose? Round to the nearest tenth.
1.3
A nurse is preparing to administer imipramine hydrochloride (Tofranil) 75 mg PO daily. Available is imipramine hydrochloride 50 mg tablets. How many tablets should the nurse administer? Round to the nearest tenth.
1.5
A nurse is preparing acetaminophen (Tylenol) 250 mg PO every 4 hours. Available is acetominophen oral suspension 120 mg/5mL. How many mL should the nurse administer per dose? Round to the nearest whole number.
10
A nurse is preparing to administer ampicillin (principen) 50 mg/kg/day PO divided in equal doses every 6 hr to a child who weighs 88 lb. Available is ampicillin oral suspension 250 mg/5 mL. How many mL should the nurse administer per dose? Round to the nearest whole number.
10
A nurse is preparing to administer ondansetron (Zofran) 4 mg by IV bolus stat. Available is ondansetron injection 4 mg in 0.9% sodium chloride (0.9% NaCl) 25 mL to infuse over 15 min. The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest whole number.
100
A medication is ordered for 500 mg IV q8h. The patient weighs 220 lbs. The package states that the recommended dose is 10 to 20 mg/kg/day, to be divided and administered every 6 to 8 hours, up to a maximum of 750 mg per dose. What is the recommended daily range for this patient? Is the prescribed dose safe? Round to the nearest whole number.
1000-2000; 1500 (safe)
A nurse is perparing to administer potassium chloride (k-Lor) 15 mEq PO every 12 hours. Available is potassium chloride liquid 20 mEq/15mL. How many mL should the nurse administer per dose? Round to the nearest whole number.
11
A nurse is preparing to administer phenytoin (Dilantin) 15 mg/kg/day PO divided in equal doses every 8 hr to a client who weighs 120 lb. Available is phenytoin suspension 125 mg/5mL. How many mL should the nurse administer per dose? Round to the nearest whole number.
11
A nurse is preparing to administer famotidine (Pepcid) 0.5 mg/kg PO every 12 hr to a child who weighs 50 lb. How many mg should the nurse administer per dose? Round to the nearest tenth.
11.4
A nurse is caring for a child who weighs 13 kg. What is the child's daily maintenance fluid requirement? Round to the nearest whole number. <10 kg: 100 mL/kg 10-20 kg: 1000 mL for 1st 10 kg + 50 mL/kg >20 kg: 1500 mL for 1st 20 kg + 20 mL/kg
1150
A provider prescribes esmolol (Brevibloc) 30 mcg/kg/min by continuous IV infusion for a client who weights 67 kg. Available is esmolol 2,500 mg in 250 mL dextrose 5% in water (D5W). The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest tenth.
12.1
A nurse is preparing to administer lactated ringer's 1 L to infuse over 2 hr. The drop factor of the manual IV tubing is 15 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min? Round to the nearest whole number.
125
A nurse is preparing to administer nitroprusside (Nipride) 7 mcg/kg/min by continuous IV infusion to a client who weighs 63 kg. Available is nitroprusside 50 mg in 250 mL dextrose 5% in water (D5W). The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest tenth.
132.3
A nurse is preparing to administer 0.9% sodium chloride 300 mL IV over 30 min to a client. The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest whole number.
600
A nurse is caring for a child who weighs 8 lb 6 oz. What is the hourly IV rate needed to meet the daily maintenance fluid requirement? Round to the nearest tenth. <10 kg: 100 mL/kg 10-20 kg: 1000 mL for 1st 10 kg + 50 mL/kg >20 kg: 1500 mL for 1st 20 kg + 20 mL/kg
15.9
A patient who weighs 129 lb is receiving continuous heparin therapy. The heparin is available as 25,000 units per 250 mL and is infusing at a rate of 12 units/kg/hr. Based on the patient's aPTT result, the nurse needs to increase the infusion rate by 2 units/kg/hr and administer 30 units/kg IV bolus. How many mL will the patient receive as a bolus? How many mL/hr should the nurse administer the infusion?
17.6; 8.2
A patient who weighs 65 kg is receiving continuous heparin therapy. The heparin is available as 12,500 units per 250 mL and is infusing at a rate of 16 units/kg/hr. Based on the patient's aPTT result, the nurse needs to decrease the infusion rate by 1 mL/hr. How many mL/hr should the nurse administer the infusion? How many units will the patient be receiving in an hour?
19.8; 990
A nurse is preparing to administer dextrose 5% in water (D5W) 500 mL IV to infuse over 45 min to a client. If a 1 L bag is started at 0800, how long will the infusion take to infuse, and at what time will the infusion bag need to be replaced?
1h 30m; 0930
A nurse is preparing to administer amoxicillin (Amoxil) 500 mg PO every 8 hours. Available is amoxicillin oral suspension 250 mg/5mL. How many tsp should the nurse administer per dose? Round to the nearest whole number.
2
A nurse is caring for a patient who weighs 122 lb 4 oz. What is the patient's daily maintenance fluid requirement? Round to the nearest whole number. <10 kg: 100 mL/kg 10-20 kg: 1000 mL for 1st 10 kg + 50 mL/kg >20 kg: 1500 mL for 1st 20 kg + 20 mL/kg
2211
A nurse is preparing to administer to loading dose of phenytoin (Dilantin) 5 mg/kg IV bolus stat to an infant who weighs 12 lb 4 oz. How many mg should the nurse administer? Round to the nearest whole number.
28
The order is to give 125 mg of a medication IV q4h for a patient that weighs 25 pounds. The recommended safe daily range for a pediatric patient is 30 to 50 mg/kg/day. What is the recommended daily range for this patient? Is the prescribed dose safe? Round to the nearest whole number.
341-568; 750 (unsafe)
The order is to administer heparin 50 units/kg IV bolus to a patient who weighs 70 kg. After the bolus, the nurse is to start a continuous IV heparin infusion of 12 units/kg/hr. The heparin is available as 25,000 units per 250 mL. How many mL will the patient receive as a bolus? How many mL/hr should the nurse administer the infusion?
35; 8.4
A nurse is preparing to administer hydromorphone (Dilaudid) 4 mg PO every 6 hours PRN for pain. Available is hydromorphone oral liquid 5 mg/5mL. How many mL should the nurse administer per dose? Round to the nearest whole number.
4
A nurse is preparing to administer rifampin (Rifadin) 0.6 g PO daily. Available is rifampin 150 mg tablets. How many tablets should the nurse administer daily? Round to the nearest whole number.
4
A nurse is preparing to administer 0.9% sodium chloride (0.9% NaCl) 500 mL IV to infuse over 2 hr. The drop factor of the manual IV tubing is 10 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min? Round to the nearest whole number.
42
The order is to give ampicillin 580 mg every 4 hours for a patient that weighs 11 pounds. The recommended safe daily range is 100 to 200 mg/kg/day in 6 divided doses. What is the recommended daily range for this patient? Is the prescribed dose safe? Round to the nearest whole number.
500-1000; 3480 (unsafe)
A nurse is preparing to administer lactated ringer's 500 mL IV to infuse over 3 hours. The drop factor of the manual IV tubing is 20 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min? Round to the nearest whole number.
56
A nurse is caring for an infant who weighs 12 lb 12 oz. What is the infant's daily maintenance fluid requirement? Round to the nearest whole number. <10 kg: 100 mL/kg 10-20 kg: 1000 mL for 1st 10 kg + 50 mL/kg >20 kg: 1500 mL for 1st 20 kg + 20 mL/kg
580
A nurse is preparing methylprednisolone acetate (Depo-Medrol) 15 mg IM every other week. Available is methylprednisolone acetate 20 mg/mL. How many mL should the nurse administer per dose? Round to the nearest tenth.
0.8
A nurse is preparing to administer epinephrine (Adrenalin) 10 mcg/min by continuous IV infusion. Available is epinephrine 1 mg in 250 mL dextrose 5% in water (D5W). The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest whole number.
150
A nurse is preparing to administer potassium gluconate (Kaon) 25 mEq in 6 oz of water. How many mL of water should the nurse administer? Round to the nearest whole number.
180
A nurse is preparing to administer 0.45% sodium chloride 600 mL IV to infuse at a rate of 125 mL/hr. The nurse starts the infusion at 0800. How long will the infusion take to infuse, and at what time will the infusion be completed?
4h 48m; 1248
A nurse is preparing to administer diphenhydramine (Benadryl) 25 mg PO every 12 hours. Available is diphenhydramine syrup 12.5 mg/5 mL. How many tsp should the nurse administer? Round to the nearest whole number.
2
An infant weighing 12 lb is consuming 3 ½ oz of formula q4h. What is the infant's daily maintenance fluid requirement? How much is the infant actually consuming? Round to the nearest whole number. <10 kg: 100 mL/kg 10-20 kg: 1000 mL for 1st 10 kg + 50 mL/kg >20 kg: 1500 mL for 1st 20 kg + 20 mL/kg
545; 630
A nurse is preparing to administer valproic acid (Depakote) 45 mg/kg/day PO divided in equal doses every 8 hr to a child who weighs 66 lb. Available is valproic acid syrup 250 mg/5 mL. How many mL should the nurse administer per dose? Round to the nearest whole number.
9
A nurse is preparing to administer epinephrine (Adrenalin) 8 mcg/min by continuous IV infusion. Available is epinephrine 1 mg in 250 mL dextrose 5% in water (D5W). The nurse should set the IV pump to deliver how many mL/hr? Round to the nearest whole number.
120
A nurse is preparing to administer nitroglycerin 15 mcg/min by continuous IV infusion. Available is nitroglycerin 25 mg in 250 mL of dextrose 5% in water (D5W). The nurse should set the IV pump to deliver how many mL? Round to the nearest whole number.
9
A nurse is preparing to administer ethosuximide (Zarontin) 500 mg PO every 12 hours. Available is ethosuximide syrup 250 mg/tsp. How many mL should the nurse administer? Round to the nearest whole number.
10
