Dosage Calculations Assignment Quiz
A client who had a small bowel resection two weeks ago is receiving 3/4 strength Ensure
feedings 275 ml every 4 hours via nasogastric tube. Full strength Ensure is available in a 240 ml
can. The nurse should use how many ml of Ensure to prepare the feeding? (Enter numeric value
only. Round to nearest whole number if needed.)
Using the formula Desired % / on Hand % x Volume Desired = 75/100 x 275 = 0.75 x 275 = 206
Ensure
206 ml Ensure + 69 ml water = 275 ml (75% solution)
A client admitted to the unit from the emergency room receives a prescription for an IV
infusion of 0.9% sodium chloride 1,000 ml at 750 ml/4 hours. The IV administration set delivers
60 gtts/ml. The nurse should regulate the infusion to deliver how many gtts/minute? (Enter
numeric value only. If rounding is required, round to the nearest whole number.)
First convert hours to minutes: 4 hours x 60 = 240 minutesUsing formula Volume/Time x gtt
factor: 750 ml/240 min = 3.125 x 60gtts = 187.5 (rounding to) 188 gtts/minute
The nurse is preparing a tube feeding of Ensure 280 ml (50% solution). Full strength Ensure is
available in a 240 ml can. The nurse should use how many ml of Ensure to prepare the feeding?
(Enter numeric value for only. If rounding is required, round to nearest whole number.)
Using the formula D/H (Desired % / % on Hand) x Total volume desired:
50/100 x 280ml = 0.5 x 280 ml = 140 ml Ensure + 140 ml water = 280 ml (50% solution)
A client scheduled for a stress echocardiogram is to receive an IV infusion of Dextrose 5% in
Water (D5W) with dobutamine (Dobutrex) 0.5 grams/250 ml at a rate of 1,200 mcg/minute.
,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.)
First calculate the number of mcg/hour: 1,200 x 60 minutes = 72,000 mcg/hourNext calculate
the number of ml/hour needed to administer 72,000 mcg/hour500,000 mcg : 250 ml :: 72,000
mcg : X500,,000 :: 250 / X500,000X = 18,000,000X = 36 ml/hour
A client experiencing ventricular tachycardia receives a prescription a continuous infusion of
dextrose 5% in water (D5W) 1000 ml with lidocaine (Xylocaine) 2 grams at a rate of 4 mg per
minute. 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.)
First convert solution gram/ml to milligrams/ml: 2 gm/1000 ml = 2000 mg/1000 ml = 2
mg/mlNext calculate the number of mg/hour for the dose: 4 mg X 60 minutes = 240
mg/hourNext calculate the number of ml/hour needed to administer 240 mg/hour: 2000 mg:
1000 ml :: 240 mg : X ml2000/240 = 1000/XX = 120 ml/hour
The healthcare provider prescribes an intermittent infusion of nafcillin (Unipen) 800 mg IV for a
pediatric client. The drug is dispensed in a concentration of 250 mg/ml, and the recommended
infusion concentration is 40 mg/ml. When adding the prescribed dose to the volume control
device, how many ml of IV solution should the nurse add to dilute? (Enter numeric value only. If
rounding is required, round to the nearest tenth.)
First, calculate the amount of milliliters of medication needed to provide 800 mg of nafcillin.
Prescribed dose (800 mg) divided by dose on hand (250 mg/ml) equals 3.2 mlNext, determine
the recommended concentration using equivalent fractions. 800 mg/X = 40 mg/1 ml40X = 800 =
20 ml (the total volume at the recommended concentration)20 ml (total volume) minus the 3.2
ml (800 mg dose) equals an additional 16.8 ml of fluid to be added to the volume control device
to obtain the recommended concentration.
The nurse programs an IV infusion pump of Ringer's Lactated 1,000 ml with oxytocin (Pitocin)
40 units to be delivered at 15 ml/hour. How many milliunits/minute is the client receiving?
(Enter numeric value only, whole number.)
,Convert units to milliunits, 40 x 1,000 = 40,000 milliunits. Using D/H x Q = 15 ml/hour: X/40,000
milliunits x 1,000 ml = 15 ml/hour (60 minutes)
X/40 =15/60
60X = 600
X = 10
Fill in the blank
The healthcare provider prescribes phytonadione (AquaMEPHYTON) 250 mcg IM to be
administered to an infant within 1 hour of admission to the nursery. A 0.5 ml ampule labeled 2
mg in 1 ml is available. The nurse should administer how many ml? (Enter numeric value only. If
rounding is required, round to the nearest hundredth.)
Change mcg to mg, 1000 mcg = 1 mgUse ratio and proportion to calculate the dose: 2 mg : 1 ml
:: 0.25 mg : X ml2X = 0.25 mgX = 0.125 =0.13 ml
Oxytocin (Pitocin) 4 milliunits/minute IV is prescribed for a client with an ineffective contraction
pattern. To administer the prescribed dosage, the nurse adds 20 units of oxytocin to Ringer's
Lactate 1,000 ml . The infusion pump should be set to deliver how many ml/hour. (Enter
numeric value only.)
4 milliunits/min x 1 unit/1000 milliunits x 1000 ml/20 units x 60 min/hr = 240,000/20,000 = 12
ml/hour
A client with coronary artery disease receives a prescription for clopidogrel (Plavix) 300 mg PO.
The medication is available in 75 mg tablets. How many tablets should the nurse administer?
(Enter numeric value only.)
Using the formula, Desired/Have: 300 mg/75 mg = 4 tablets
, A client who has preeclampsia receives a prescription for an IV infusion of 0.9% normal saline
with magnesium sulfate 4 gram/250 ml to be infused at a rate of 125 ml/hour. The nurse should
administer how many mg/hour of magnesium sulfate? (Enter numeric value only. If rounding is
required, round to the nearest whole number.)
To calculate the amount of medication being delivered each hour: First convert grams to mg: 1
gram = 1000 mg :: 4 grams = 4000 mgNext calculate number of mg delivered/hour4000 mg :
250 ml :: X mg : 125 ml4000/X :: 250/12550000= 250XX = 2000 mg/hour
The nurse needs to calculate a client's oral temperature of 99.2??? Fahrenheit to Celsius. What
temperature in Celsius should the nurse document? (Enter numeric value only. Round to the
nearest tenth.)
Use the formula to convert Fahrenheit to Celsius, Fahrenheit temperature (99.2) minus 32
divided by 1.8 = 37.3 degrees Celsius.
The nurse plans to administer labetalol hydrochloride (Trandate) 0.3 grams PO to a client with
hypertension. Trandate is available in 200 mg scored tablets. How many tablets should the
nurse administer? (Enter numeric value only.)
First convert grams to milligrams using the known conversion: 1 gram = 1000 mg.
0.1 gram = 100 mg as 0.3 gram = 300 mg
Next using the formula, Desired/Available x 1 tablet =
300 mg/200 mg x 1 = 1.5 tablets
A client is receiving acetaminophen (Tylenol) 0.65 gram PO every 6 hours PRN for pain.
Acetaminophen is available in 325 mg tablets. How many milligrams should the nurse
administer? (Enter numeric value only.)
Using the known equivalent, 1 gram = 1000 mg, the nurse should first convert the dose to the
same unit of measurement, which is 0.65 grams = 650 mg.
A client who had a small bowel resection two weeks ago is receiving 3/4 strength Ensure
feedings 275 ml every 4 hours via nasogastric tube. Full strength Ensure is available in a 240 ml
can. The nurse should use how many ml of Ensure to prepare the feeding? (Enter numeric value
only. Round to nearest whole number if needed.)
Using the formula Desired % / on Hand % x Volume Desired = 75/100 x 275 = 0.75 x 275 = 206
Ensure
206 ml Ensure + 69 ml water = 275 ml (75% solution)
A client admitted to the unit from the emergency room receives a prescription for an IV
infusion of 0.9% sodium chloride 1,000 ml at 750 ml/4 hours. The IV administration set delivers
60 gtts/ml. The nurse should regulate the infusion to deliver how many gtts/minute? (Enter
numeric value only. If rounding is required, round to the nearest whole number.)
First convert hours to minutes: 4 hours x 60 = 240 minutesUsing formula Volume/Time x gtt
factor: 750 ml/240 min = 3.125 x 60gtts = 187.5 (rounding to) 188 gtts/minute
The nurse is preparing a tube feeding of Ensure 280 ml (50% solution). Full strength Ensure is
available in a 240 ml can. The nurse should use how many ml of Ensure to prepare the feeding?
(Enter numeric value for only. If rounding is required, round to nearest whole number.)
Using the formula D/H (Desired % / % on Hand) x Total volume desired:
50/100 x 280ml = 0.5 x 280 ml = 140 ml Ensure + 140 ml water = 280 ml (50% solution)
A client scheduled for a stress echocardiogram is to receive an IV infusion of Dextrose 5% in
Water (D5W) with dobutamine (Dobutrex) 0.5 grams/250 ml at a rate of 1,200 mcg/minute.
,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.)
First calculate the number of mcg/hour: 1,200 x 60 minutes = 72,000 mcg/hourNext calculate
the number of ml/hour needed to administer 72,000 mcg/hour500,000 mcg : 250 ml :: 72,000
mcg : X500,,000 :: 250 / X500,000X = 18,000,000X = 36 ml/hour
A client experiencing ventricular tachycardia receives a prescription a continuous infusion of
dextrose 5% in water (D5W) 1000 ml with lidocaine (Xylocaine) 2 grams at a rate of 4 mg per
minute. 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.)
First convert solution gram/ml to milligrams/ml: 2 gm/1000 ml = 2000 mg/1000 ml = 2
mg/mlNext calculate the number of mg/hour for the dose: 4 mg X 60 minutes = 240
mg/hourNext calculate the number of ml/hour needed to administer 240 mg/hour: 2000 mg:
1000 ml :: 240 mg : X ml2000/240 = 1000/XX = 120 ml/hour
The healthcare provider prescribes an intermittent infusion of nafcillin (Unipen) 800 mg IV for a
pediatric client. The drug is dispensed in a concentration of 250 mg/ml, and the recommended
infusion concentration is 40 mg/ml. When adding the prescribed dose to the volume control
device, how many ml of IV solution should the nurse add to dilute? (Enter numeric value only. If
rounding is required, round to the nearest tenth.)
First, calculate the amount of milliliters of medication needed to provide 800 mg of nafcillin.
Prescribed dose (800 mg) divided by dose on hand (250 mg/ml) equals 3.2 mlNext, determine
the recommended concentration using equivalent fractions. 800 mg/X = 40 mg/1 ml40X = 800 =
20 ml (the total volume at the recommended concentration)20 ml (total volume) minus the 3.2
ml (800 mg dose) equals an additional 16.8 ml of fluid to be added to the volume control device
to obtain the recommended concentration.
The nurse programs an IV infusion pump of Ringer's Lactated 1,000 ml with oxytocin (Pitocin)
40 units to be delivered at 15 ml/hour. How many milliunits/minute is the client receiving?
(Enter numeric value only, whole number.)
,Convert units to milliunits, 40 x 1,000 = 40,000 milliunits. Using D/H x Q = 15 ml/hour: X/40,000
milliunits x 1,000 ml = 15 ml/hour (60 minutes)
X/40 =15/60
60X = 600
X = 10
Fill in the blank
The healthcare provider prescribes phytonadione (AquaMEPHYTON) 250 mcg IM to be
administered to an infant within 1 hour of admission to the nursery. A 0.5 ml ampule labeled 2
mg in 1 ml is available. The nurse should administer how many ml? (Enter numeric value only. If
rounding is required, round to the nearest hundredth.)
Change mcg to mg, 1000 mcg = 1 mgUse ratio and proportion to calculate the dose: 2 mg : 1 ml
:: 0.25 mg : X ml2X = 0.25 mgX = 0.125 =0.13 ml
Oxytocin (Pitocin) 4 milliunits/minute IV is prescribed for a client with an ineffective contraction
pattern. To administer the prescribed dosage, the nurse adds 20 units of oxytocin to Ringer's
Lactate 1,000 ml . The infusion pump should be set to deliver how many ml/hour. (Enter
numeric value only.)
4 milliunits/min x 1 unit/1000 milliunits x 1000 ml/20 units x 60 min/hr = 240,000/20,000 = 12
ml/hour
A client with coronary artery disease receives a prescription for clopidogrel (Plavix) 300 mg PO.
The medication is available in 75 mg tablets. How many tablets should the nurse administer?
(Enter numeric value only.)
Using the formula, Desired/Have: 300 mg/75 mg = 4 tablets
, A client who has preeclampsia receives a prescription for an IV infusion of 0.9% normal saline
with magnesium sulfate 4 gram/250 ml to be infused at a rate of 125 ml/hour. The nurse should
administer how many mg/hour of magnesium sulfate? (Enter numeric value only. If rounding is
required, round to the nearest whole number.)
To calculate the amount of medication being delivered each hour: First convert grams to mg: 1
gram = 1000 mg :: 4 grams = 4000 mgNext calculate number of mg delivered/hour4000 mg :
250 ml :: X mg : 125 ml4000/X :: 250/12550000= 250XX = 2000 mg/hour
The nurse needs to calculate a client's oral temperature of 99.2??? Fahrenheit to Celsius. What
temperature in Celsius should the nurse document? (Enter numeric value only. Round to the
nearest tenth.)
Use the formula to convert Fahrenheit to Celsius, Fahrenheit temperature (99.2) minus 32
divided by 1.8 = 37.3 degrees Celsius.
The nurse plans to administer labetalol hydrochloride (Trandate) 0.3 grams PO to a client with
hypertension. Trandate is available in 200 mg scored tablets. How many tablets should the
nurse administer? (Enter numeric value only.)
First convert grams to milligrams using the known conversion: 1 gram = 1000 mg.
0.1 gram = 100 mg as 0.3 gram = 300 mg
Next using the formula, Desired/Available x 1 tablet =
300 mg/200 mg x 1 = 1.5 tablets
A client is receiving acetaminophen (Tylenol) 0.65 gram PO every 6 hours PRN for pain.
Acetaminophen is available in 325 mg tablets. How many milligrams should the nurse
administer? (Enter numeric value only.)
Using the known equivalent, 1 gram = 1000 mg, the nurse should first convert the dose to the
same unit of measurement, which is 0.65 grams = 650 mg.
