HESI Dosage Calculations Practice Exam With Complete Solutions
Using the conversion of 1 gram = 1000 mg: 0.1 gram = 100 mg 100 mg = 1
capsule
A client has a prescription for inamrinone (Inocor) 0.75 mg/kg IV bolus to
be delivered over 3 minutes. The client weighs 80 kg. Inamrinone is
available for injection 100 mg/20 ml. How many ml of inamrinone should
the nurse administer? (Enter numeric value only. If rounding is required,
round to the nearest tenth.) - 12
First calculate the mg/kg dosage needed: 0.75 mg x 80 kg = 60 mg
needed. Then calculate Desired / Have x ml 60 mg / 100 mg x 20 ml = 12
ml.
A client who had mitral valve replacement surgery receives a
prescription for dextrose 5% in water with 0.5 grams of dobutamine in
250 ml for IV infusion at a rate of 5 mcg/kg/minute. The client weighs 75
kg. The nurse should program the infusion pump to deliver how many
ml/hr? (Enter numeric value only. If rounding is required, round to the
nearest tenth.) - 11.3
First calculate the number of mcg/kg/minute: 5 x 75 = 375 mcg/minute.
Calculate the number of mcg/hour: 375 x 60 minutes = 22,500
mcg/hour. Next calculate the number of ml/hour needed to administer
22,500 mcg/hour: 500,000 mcg : 250 ml :: 22,500 mcg/ X ml 500,000X
= 5,625,000 X = 11.25 (rounded to 11.3 ml/hour).

A healthcare provider prescribes a continuous infusion of 0.9% sodium
chloride with pancuronium (Pavulon) 25 mg/250 ml at a rate of 0.1
mg/kg/hr for a client with coronary artery bypass grafting. The client
weighs 78 kg. The nurse should program the infusion pump to deliver how
many ml/hour? (Enter numeric value only. If rounding is required, round
to the nearest tenth. - 78
First calculate the number of mg the client will receive in 1 hour: 0.1 mg x
78 kg = 7.8 mg/hour. Next calculate the number of ml containing 7.8 mg
of medication: 25 mg : 250 ml :: 7.8 mg : X 25 mg/ 7.8 mg :: 250 ml/X 25X
= 1950 X = 78 ml/hour.
A client scheduled for surgery is to receive an IV infusion of 0.9% sodium
chloride with prochlorperazine edisylate (Compazine) 10 mg/50 ml over
30 minutes. The nurse should program the infusion pump to deliver how
many ml/hour? (Enter numeric value only.) - 100
Calculate: 50 ml : 30 minutes :: X ml : 60 minutes 50/X :: 30/60 3000 =
15X X = 100 ml
The healthcare provider prescribes an IV infusion of 0.9% sodium
chloride with 40 mEq KCl/500 ml to infuse over 3 hours for a client with
hypokalemia. The nurse should program the infusion pump to deliver how
many ml/hour? (Enter numeric value only. If rounding is required, round
to the nearest whole number.) - 167

To determine ml/hour: 500 ml : 3 hours :: as X ml : 1 hour 500/X :: 3/1
500 = 3X X = 166.66 (rounds to)= 167 ml/hour.
The healthcare provider prescribes a continuous infusion of 5% dextrose
in 0.45% sodium chloride at 85 ml/hour. The IV administration set
delivers 10 gtt/ml. The nurse should regulate the drop rate to deliver how
many gtts/minute? (Enter numeric value only. If rounding is required,
round to the nearest whole number.) - 14
Volume/Time (minutes) x drop factor (gtt/ml) = 85 ml/ 60 minutes x 10
gtt/ml = 14.16 = 14 gtt/minute
A client with cardiogenic shock weighs 220 lb and is receiving dopamine
at the rate of 3 mcg/kg/minute. The solution strength available is
dopamine 400 mg in 250 ml of D5W. The nurse should set the infusion
pump to deliver how many ml/hour? (Enter numeric value only. If
rounding is required, round to the nearest tenth.) - 11.3
First, convert pounds to kg, 220 lb : X = 2.2 lb : 1 kg = 100 kg. Next,
calculate the dosage per minute, 3 mcg/kg/min x 100 kg = 300 mcg/min.
Convert mcg/min to mcg/hour, 300 mcg/min x 60 min=18,000
mcg/hour. Convert mcg/hr to mg/hour, 18,000 mcg/hr = 18.0 mg/hour.
Calculate the rate, 400 mg : 250 ml = 18 mg : X ml 400X = 4500 X = 11.25
= 11.3 ml. So, 18 mg/11.3 ml should be infused at 11.3 ml/hour.

A client with hypertension who weighs 72.4 kg is receiving an infusion of
nitroprusside (Nipride) 50 mg in D5W 250 ml at 75 ml/hour. How many
mcg/kg/minute is the client receiving? (Enter numeric value only. If
rounding is required, round to the nearest tenth.) - 3.5
A male client receives a prescription for ondansetron hydrochloride
(Zofran) 4 mg IV to prevent postoperative nausea after an inguinal hernia
repair. The medication is available in 2 mg/ml. How many ml should the
nurse administer? (Enter numeric value only.) - 2
Use ratio and proportion, 4 mg : X ml = 2 mg : 1 ml 2X = 4 X = 2
The nurse is preparing to administer Hepatitis B Vaccine, Recombinant
(Energix-B) 5 mcg IM to a school-aged child. The vaccine is labeled, 10
mcg/ml. How many ml should the nurse administer? (Enter numeric value
only. If rounding is required, round to the nearest tenth). - 1 or 0.5
Use ratio and proportion, 5 mcg : X ml :: 10 mcg : 1ml
10X = 5 X = 0.5 ml
A client's daily PO prescription for aripiprazole (Abilify) is increased from
15 mg to 30 mg. The medication is available in 15 mg tablets, and the client
already received one tablet today. How many additional tablets should the
nurse administer so the client receives the total newly prescribed dose
for the day? (Enter numeric value only.) - 1

30 mg (total dose) - 15 mg (dose already administered) = 15 mg that still
needs to be administered. Using the Desired/Have formula: 15 mg/15 mg
= 1 tablet
At the end of the shift, the nurse is recording the fluid balance for a client
receiving a continuous gastrostomy tube (GT) feeding. Based on the
client's records, how many ml should the nurse record for the total fluid
balance (intake - output) for the shift that started at 0700 and ended at
1900? (Enter numeric value only.) (Click on each image asset for
additional information.) - 695
The tube feeding is administered at 75 ml/hour for 11 hours (0700 - 1800)
and then turned off for one hour because the residual is greater than 200
ml. 11 hours x 75 ml/hr = 825 ml. Three doses of 20 ml of medication are
administered, with 10 ml of water used to flush the GT before and after
each dose. 20 ml x 3 doses = 60 ml; 10 ml (flush) x 2 x 3 doses = 60 ml;
so 825 ml + 60 ml + 60 ml = 945 ml. 250 ml of residual is removed and
not replaced. 945 ml - 250 ml = 695 ml total fluid balance (Intake -
output).
The nurse is administering a 250 milliliter (ml) intravenous solution to be
infused over 2 hours. How many ml/hour should the nurse program the
infusion pump? (Enter numeric value only.) - 125
250 ml : 2 hours = X ml : 1 hour 250 = 2X X = 250 divided by 2 = 125 ml/hr

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HESI Pharmacology Practice Exam With Answers (102 Solved Questions)

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