Dosage Calculation Practice Exam 1
Questions and Answers
A nurse is to administer 30 mg of furosemide (Lasix) to a client with congestive heart
failure (CHF). The vial contains 40 mg/mL. Which is the correct dose to administer? -
ANSWER-0.75 mL
The nurse is providing discharge teaching for a client who has been prescribed 600 mg
of an oral liquid medication. The mother shows the nurse the label of the medication,
which reads: 250 mg/mL. The nurse would instruct the mother to give how many
milliliters? - ANSWER-2.4 mL
A child is to receive 500 mg of an antibiotic suspension. The label on the bottle reads
250 mg/5 mL. The nurse should administer how much of the suspension in one dose? -
ANSWER-10 mL
A health care provider orders 250 mg of an antibiotic suspension. The label on the
suspension reads "500 mg/5 mL." How much would the nurse administer? - ANSWER-
2.5 mL
A patient has an order for Chloromycetin, 500 mg every 6 hours. The drug comes in 250
mg capsules. What would the nurse administer? - ANSWER-2 tabs
A nurse is to administer 150 mg of a drug intramuscularly. The label on the multidose
vials reads 100 mg/mL. How much would the nurse give? - ANSWER-1.5 mL
The client is to be given ascorbic acid 1 g daily by mouth. The medication comes in a
container labeled, "Ascorbic Acid 250 mg tablets." How much will the nurse give? -
ANSWER-4 tabs
The PCP orders amoxicillin 250 mg by mouth two times a day. The drug label reads
"Amoxicillin 125 mg/5 ml." How much will the nurse administer? - ANSWER-10 mL
A nurse is to administer 175 mg of a medication intramuscularly. The label on the
multidose vial states that the concentration is 100 mg/mL. What volume of the drug
should the nurse administer? - ANSWER-1.7 mL
The nurse is preparing to administer 80 mg of Solu-medrol intravenously (IV) to a client
with pneumonia. The vial states that it has 120 mg per 2 mL. The nurse would correctly
draw up which amount? - ANSWER-1.3 mL
, The health care provider prescribes ascorbic acid 0.5 g daily. The drug label reads
ascorbic acid 250 mg. The nurse would administer how many tablets? - ANSWER-2
tabs
A client is being treated for congestive heart failure (CHF) and is to receive 0.5
milligrams of digoxin, which is available in 250-microgram tablets. The nurse would
correctly administer how many tablets? - ANSWER-2 tabs
Heparin protocol is prescribed for a client weighing 90 kg. Per protocol, the heparin
loading dose is 60 units/kg IV rounded to the nearest 100 units, with a maximum loading
dose of 4,000 units. The heparin vial is labeled 5,000 units/ml. How many ml should the
nurse administer? (Enter the numeric value only. If rounding is required, round to the
nearest tenth.)
false Item 51164 By Sheila Duncan Heparin Protocol:
Heparin loading dose: 60 units/kg IV, rounded to the nearest 100 units, followed by a
maintenance infusion of 12 units/kg/hr, rounded to the nearest 100 units/hr. The
maximum bolus is 4,000 units and the maximum initial infusion is 1000 units/hr. -
ANSWER-Determine the client loading dose: 60 units x 90 kg = 5,400 unit.
Per protocol, use the maximum loading dose of 4,000 units, and calculate the client's
dose using the formula D/H x Q = 4,000 units / 5,000 units x 1 ml = 4/5 = 0.8 ml
or Use ratio and proportion: 5,000 : 1 ml :: 4,000 : X
X = 0.8 ml
A child weighing 28.4 kg is in hypertensive crisis. The healthcare provider prescibes
methyldopa (Aldomet) 40 mg/kg/day IV in 4 divided doses. The pharmacy provides a 50
mg/ml injection vial. How many ml should the nurse administer? (Enter numeric value
only. If rounding is required, round to the nearest tenth.) - ANSWER-First calculate the
total mg dose/day: 40 mg x 28.4 kg = 1136 mg/day
Next divide the total mg into the 4 dosages for the day: 1136 mg/4 doses = 284
mg/dose
Using the Desired/Have formula: 284 mg/50mg x 1 ml = 5.68 ml/ dose, rounded to 5.7
ml.
A client with multiple sclerosis and muscle spasms receives a prescription for baclofen
(Kemstro) 30 mg PO daily. The medication is supplied from the pharmacy in 20 mg
scored tablets. How many tablets should the nurse administer? (Enter numeric value
only. If rounding is required, round to the nearest tenth.) - ANSWER-Use ratio and
proportion, 30 mg : X tablets = 20 mg : 1 tablet
20X = 30
X = 1.5
A client with dehydration receives a prescription for an IV of Lactated Ringer's 1,000 ml
to be administered over 8 hours. The nurse should program the infusion pump to deliver
how many ml/hour? (Enter numeric value only, using whole number.) - ANSWER-Use
the ratio of: 1000 ml : 8 hours :: X : 1 hour
1000/X :: 8/1
X = 125 ml/hour
Questions and Answers
A nurse is to administer 30 mg of furosemide (Lasix) to a client with congestive heart
failure (CHF). The vial contains 40 mg/mL. Which is the correct dose to administer? -
ANSWER-0.75 mL
The nurse is providing discharge teaching for a client who has been prescribed 600 mg
of an oral liquid medication. The mother shows the nurse the label of the medication,
which reads: 250 mg/mL. The nurse would instruct the mother to give how many
milliliters? - ANSWER-2.4 mL
A child is to receive 500 mg of an antibiotic suspension. The label on the bottle reads
250 mg/5 mL. The nurse should administer how much of the suspension in one dose? -
ANSWER-10 mL
A health care provider orders 250 mg of an antibiotic suspension. The label on the
suspension reads "500 mg/5 mL." How much would the nurse administer? - ANSWER-
2.5 mL
A patient has an order for Chloromycetin, 500 mg every 6 hours. The drug comes in 250
mg capsules. What would the nurse administer? - ANSWER-2 tabs
A nurse is to administer 150 mg of a drug intramuscularly. The label on the multidose
vials reads 100 mg/mL. How much would the nurse give? - ANSWER-1.5 mL
The client is to be given ascorbic acid 1 g daily by mouth. The medication comes in a
container labeled, "Ascorbic Acid 250 mg tablets." How much will the nurse give? -
ANSWER-4 tabs
The PCP orders amoxicillin 250 mg by mouth two times a day. The drug label reads
"Amoxicillin 125 mg/5 ml." How much will the nurse administer? - ANSWER-10 mL
A nurse is to administer 175 mg of a medication intramuscularly. The label on the
multidose vial states that the concentration is 100 mg/mL. What volume of the drug
should the nurse administer? - ANSWER-1.7 mL
The nurse is preparing to administer 80 mg of Solu-medrol intravenously (IV) to a client
with pneumonia. The vial states that it has 120 mg per 2 mL. The nurse would correctly
draw up which amount? - ANSWER-1.3 mL
, The health care provider prescribes ascorbic acid 0.5 g daily. The drug label reads
ascorbic acid 250 mg. The nurse would administer how many tablets? - ANSWER-2
tabs
A client is being treated for congestive heart failure (CHF) and is to receive 0.5
milligrams of digoxin, which is available in 250-microgram tablets. The nurse would
correctly administer how many tablets? - ANSWER-2 tabs
Heparin protocol is prescribed for a client weighing 90 kg. Per protocol, the heparin
loading dose is 60 units/kg IV rounded to the nearest 100 units, with a maximum loading
dose of 4,000 units. The heparin vial is labeled 5,000 units/ml. How many ml should the
nurse administer? (Enter the numeric value only. If rounding is required, round to the
nearest tenth.)
false Item 51164 By Sheila Duncan Heparin Protocol:
Heparin loading dose: 60 units/kg IV, rounded to the nearest 100 units, followed by a
maintenance infusion of 12 units/kg/hr, rounded to the nearest 100 units/hr. The
maximum bolus is 4,000 units and the maximum initial infusion is 1000 units/hr. -
ANSWER-Determine the client loading dose: 60 units x 90 kg = 5,400 unit.
Per protocol, use the maximum loading dose of 4,000 units, and calculate the client's
dose using the formula D/H x Q = 4,000 units / 5,000 units x 1 ml = 4/5 = 0.8 ml
or Use ratio and proportion: 5,000 : 1 ml :: 4,000 : X
X = 0.8 ml
A child weighing 28.4 kg is in hypertensive crisis. The healthcare provider prescibes
methyldopa (Aldomet) 40 mg/kg/day IV in 4 divided doses. The pharmacy provides a 50
mg/ml injection vial. How many ml should the nurse administer? (Enter numeric value
only. If rounding is required, round to the nearest tenth.) - ANSWER-First calculate the
total mg dose/day: 40 mg x 28.4 kg = 1136 mg/day
Next divide the total mg into the 4 dosages for the day: 1136 mg/4 doses = 284
mg/dose
Using the Desired/Have formula: 284 mg/50mg x 1 ml = 5.68 ml/ dose, rounded to 5.7
ml.
A client with multiple sclerosis and muscle spasms receives a prescription for baclofen
(Kemstro) 30 mg PO daily. The medication is supplied from the pharmacy in 20 mg
scored tablets. How many tablets should the nurse administer? (Enter numeric value
only. If rounding is required, round to the nearest tenth.) - ANSWER-Use ratio and
proportion, 30 mg : X tablets = 20 mg : 1 tablet
20X = 30
X = 1.5
A client with dehydration receives a prescription for an IV of Lactated Ringer's 1,000 ml
to be administered over 8 hours. The nurse should program the infusion pump to deliver
how many ml/hour? (Enter numeric value only, using whole number.) - ANSWER-Use
the ratio of: 1000 ml : 8 hours :: X : 1 hour
1000/X :: 8/1
X = 125 ml/hour
