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Dosage calculation proctored quiz
Total Questions : 15
Showing 10 questions, Sign in for moreA nurse is preparing to administer digoxin 12 mcg/kg/day PO to be given in equal doses every 12 hours to a client who weighs 66 lb. Available is dig oxinelixir 0.05 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Convert the client’s weight to kilograms
Weight = 66 ÷ 2.2
= 30 kg
- Calculate the total daily dose
Total Daily Dose = 12 mcg × 30 kg
Total Daily Dose = 360 mcg/day
- Convert mcg to mg
360 mcg = 0.36 mg/day
- Divide the total daily dose into two equal doses
Dose per Administration = 0.36 ÷ 2
Dose per Administration = 0.18 mg per dose
- Identify the available concentration
0.05 mg/mL
- Calculate the volume to administer
Volume = 0.18 ÷ 0.05
= 3.6 mL
A nurse is preparing to administer dextromethorphan 30 mg PO. Available is dextromethorphan oral liquid 7.5 mg/5mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Identify the ordered dose and available concentration
Ordered Dose: 30 mg
Available Concentration: 7.5 mg/5 mL
- Calculate the volume to administer
Volume (mL) = (Ordered Dose ÷ Concentration) × Volume
Volume = (30 ÷ 7.5) × 5
Volume = 4 × 5
= 20 mL
A nurse is preparing to administer heparin 2,000 units subcutaneously. Available is heparin injection 5,000 units/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Identify the ordered dose and available concentration
Ordered Dose: 2,000 units
Available Concentration: 5,000 units/mL
- Calculate the volume to administer
Volume (mL) = Ordered Dose ÷ Concentration
Volume = 2,000 ÷ 5,000
= 0.4 mL
A nurse is preparing to administer hydrochlorothiazide 25 mg PO daily to a client. Available is hydrochlorothiazide 50 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Identify the ordered dose and available concentration
Ordered Dose: 25 mg
Available Concentration: 50 mg/5 mL
- Calculate the volume to administer
Volume (mL) = (Ordered Dose ÷ Concentration) × Volume
Volume = (25 ÷ 50) × 5
Volume = 0.5 × 5
= 2.5 mL
A nurse is preparing to administer furosemide 40 mg IV push (injectable). Available is furosemide 10 mg/1 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Identify the ordered dose and available concentration
Ordered Dose: 40 mg
Available Concentration: 10 mg/1 mL
- Calculate the volume to administer
Volume (mL) = Ordered Dose ÷ Concentration
Volume = 40 ÷ 10
= 4 mL
A nurse is preparing to administer amoxicillin 500 mg PO four times each day to a client. Available is amoxicillin suspension 250 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Identify the ordered dose and available concentration
Ordered Dose: 500 mg
Available Concentration: 250 mg/5 mL
- Calculate the volume to administer
Volume (mL) = (Ordered Dose ÷ Concentration) × Volume
Volume = (500 ÷ 250) × 5
Volume = 2 × 5
= 10 mL
A nurse is preparing to administer morphine sulfate 2 mg via IV push (injectable). Available is morphine sulfate 10 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Identify the ordered dose and available concentration
Ordered Dose: 2 mg
Available Concentration: 10 mg/mL
- Calculate the volume to administer
Volume (mL) = Ordered Dose ÷ Concentration
Volume = 2 ÷ 10
= 0.2 mL
A nurse is preparing to administer phenytoin 75 mg PO every 6 hr. Available is phenytoin 25 mg/5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Identify the ordered dose and available concentration
Ordered Dose: 75 mg
Available Concentration: 25 mg/5 mL
- Calculate the volume to administer
Volume (mL) = (Ordered Dose ÷ Concentration) × Volume
Volume = (75 ÷ 25) × 5
Volume = 3 × 5
= 15 mL
A nurse is preparing to administer penicillin 250 mg IM. Available is penicillin 3 g/5 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero If it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Identify the ordered dose and available concentration
Ordered Dose: 250 mg
Available Concentration: 3 g/5 mL
= 3000 mg/5 mL
- Calculate the concentration per mL
3000 mg ÷ 5 mL = 600 mg/mL
- Calculate the volume to administer
Volume (mL) = Ordered Dose ÷ Concentration
Volume = 250 ÷ 600
Volume = 0.4167 mL
- Round to the nearest tenth
= 0.4 mL
A nurse is preparing to administer hydrocortisone 100 mg IM daily to a client. Available is hydrocortisone 250 mg/2 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Identify the ordered dose and available concentration
Ordered Dose: 100 mg
Available Concentration: 250 mg/2 mL
- Convert concentration to mg/mL
250 mg ÷ 2 mL = 125 mg/mL
- Calculate the volume to administer
Volume (mL) = Ordered Dose ÷ Concentration
Volume = 100 ÷ 125
= 0.8 mL
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