BSN HESI 215 DOSAGE CALCULATION
EXAM | QUESTIONS AND ANSWERS WITH
RATIONALE RATED A+ | LATEST
2025/2026 GUIDE | NIGHTINGALE
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.)
- Correct Answer - 2
Rationale: Use ratio and proportion
4 mg : X ml = 2 mg : 1 ml
2X = 4
X=2
A client with a gastrostomy tube (GT) receives a prescription for a 250 ml
bolus feedings of Glucerna 60% enternal formula. The nurse should
dilute the full-strength formula with how many ml of water?
- Correct Answer - 100
Rationale: Desired strength/strength of hand X volume
60/100 X 250 =
=15000/100
,=150 ml of Glucerna enteral formula
Desired strength=volume (full strength) / desire volume
=60/100 = x/250
100x = 15000
x= 150 ml
Glucerna enteral forula 250 ml total volume - 150 ml of full strength
=100 ml of water
to create 60% concentration
A client with septic shock receives a prescription for dextrose 5% in
water with dopamine (Intropin) 0.6 grams/250 ml at a rate of 5
mcg/kg/minute. The client's weight is 148 lbs. 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 whole number.)
- Correct Answer - 8
Rationale: First convert the weight into kilograms: 148 pounds/2.2 kg =
67 kg. Next calculate the number of mcg/kg/minute: 5 x 67 x 1 minute =
335 mcg/min. Calculate the number of mcg/hour: 335 x 60 minutes =
20,100 mcg/hour. Now calculate the number of ml/hour needed to
administer 20,100 mcg/hour: 600,000 mcg : 250 ml :: 20,100 mcg : X ml
600,000/20100 :: 250/X 600,000X = 5,02500 X = 8.375 (rounded to) 8
ml/hour.
, A client with type 2 diabetes is receiving metformin (Glucophage) 1 gram
PO twice daily. The medication is available in 500 mg tablets. How many
tablets should the nurse administer? (Enter numeric value only.)
- Correct Answer - 2
Rationale: Using the known equivalent, 1 gram = 1000 mg, the nurse
should first convert the dose to the same unit of measurement, which is
1 gram = 1000 mg. Using the formula, Desired / Available x 1 tablets:
1000 mg / 500 mg x 1 = 2 tablets
A client with Mycobacterium avium complex (MAC) is receiving an
infusion of 5 % dextrose in water with amikacin (Amikin) 0.572
grams/100 ml every 12 hours. The nurse prepares the dose of amikacin
using a vial labeled, 250 mg/ml. How many ml should the nurse add to
the infusion? (Enter numeric value only. If rounding is required, round to
the nearest tenth.)
- Correct Answer - 2.3
Rationale: First convert gram to milligram: 1 gm = 1000mg .572 gram x
1000 = 572 mg. Next use the formula D/H x Q: 572/250 x 1 = 2.288
(rounded to) 2.3 ml.
A client with pericardial effusion has phrenic nerve compression resulting
in recurrent hiccups. The healthcare provider prescribes metoclopramide
(Reglan) liquid 10 mg PO q 6 hours. Reglan is available as 5 mg/5 ml. A
measuring device marked in teaspoons is being used. How many
teaspoons should the nurse administer?
EXAM | QUESTIONS AND ANSWERS WITH
RATIONALE RATED A+ | LATEST
2025/2026 GUIDE | NIGHTINGALE
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.)
- Correct Answer - 2
Rationale: Use ratio and proportion
4 mg : X ml = 2 mg : 1 ml
2X = 4
X=2
A client with a gastrostomy tube (GT) receives a prescription for a 250 ml
bolus feedings of Glucerna 60% enternal formula. The nurse should
dilute the full-strength formula with how many ml of water?
- Correct Answer - 100
Rationale: Desired strength/strength of hand X volume
60/100 X 250 =
=15000/100
,=150 ml of Glucerna enteral formula
Desired strength=volume (full strength) / desire volume
=60/100 = x/250
100x = 15000
x= 150 ml
Glucerna enteral forula 250 ml total volume - 150 ml of full strength
=100 ml of water
to create 60% concentration
A client with septic shock receives a prescription for dextrose 5% in
water with dopamine (Intropin) 0.6 grams/250 ml at a rate of 5
mcg/kg/minute. The client's weight is 148 lbs. 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 whole number.)
- Correct Answer - 8
Rationale: First convert the weight into kilograms: 148 pounds/2.2 kg =
67 kg. Next calculate the number of mcg/kg/minute: 5 x 67 x 1 minute =
335 mcg/min. Calculate the number of mcg/hour: 335 x 60 minutes =
20,100 mcg/hour. Now calculate the number of ml/hour needed to
administer 20,100 mcg/hour: 600,000 mcg : 250 ml :: 20,100 mcg : X ml
600,000/20100 :: 250/X 600,000X = 5,02500 X = 8.375 (rounded to) 8
ml/hour.
, A client with type 2 diabetes is receiving metformin (Glucophage) 1 gram
PO twice daily. The medication is available in 500 mg tablets. How many
tablets should the nurse administer? (Enter numeric value only.)
- Correct Answer - 2
Rationale: Using the known equivalent, 1 gram = 1000 mg, the nurse
should first convert the dose to the same unit of measurement, which is
1 gram = 1000 mg. Using the formula, Desired / Available x 1 tablets:
1000 mg / 500 mg x 1 = 2 tablets
A client with Mycobacterium avium complex (MAC) is receiving an
infusion of 5 % dextrose in water with amikacin (Amikin) 0.572
grams/100 ml every 12 hours. The nurse prepares the dose of amikacin
using a vial labeled, 250 mg/ml. How many ml should the nurse add to
the infusion? (Enter numeric value only. If rounding is required, round to
the nearest tenth.)
- Correct Answer - 2.3
Rationale: First convert gram to milligram: 1 gm = 1000mg .572 gram x
1000 = 572 mg. Next use the formula D/H x Q: 572/250 x 1 = 2.288
(rounded to) 2.3 ml.
A client with pericardial effusion has phrenic nerve compression resulting
in recurrent hiccups. The healthcare provider prescribes metoclopramide
(Reglan) liquid 10 mg PO q 6 hours. Reglan is available as 5 mg/5 ml. A
measuring device marked in teaspoons is being used. How many
teaspoons should the nurse administer?
