Question

A nurse is preparing to administer amoxicillin 50 mg/kg/day PO divided in equal doses every 12 hr to a preschooler who weighs 44 lb. 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.)

Answer 1

Correct Answers:

10

Rationale :

✍️ Formula:

➡️ kg = lb ÷ 2.2

➡️ Daily dose (mg) = mg/kg/day × kg

➡️ Dose per dose (mg) = daily dose ÷ number of doses per day

➡️ Volume (mL) = (dose per dose ÷ stock mg) × stock mL

✍️ Given:

➡️ Weight = 44 lb

➡️ Dose = 50 mg/kg/day PO

➡️ Frequency = q12 hr → 2 doses/day

➡️ Stock = 250 mg/5 mL

✍️ Calculation:

➡️ kg = 44 ÷ 2.2 = 20 kg

➡️ Daily dose = 50 × 20 = 1,000 mg/day

➡️ Dose per dose = 1,000 ÷ 2 = 500 mg

➡️ Volume = (500 ÷ 250) × 5 = 10 mL

↦ 10 mL per dose

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Answer 2

Correct Answers:

10

Rationale :

✍️ Formula:

➡️ Time (hr) = Total volume (mL) ÷ Rate (mL/hr)

✍️ Given:

➡️ Total volume = 1,000 mL (1 L)

➡️ Rate = 100 mL/hr

✍️ Calculation:

➡️ Time = 1,000 ÷ 100

↦ 10 hr

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Answer 3

Correct Answers:

0.3

Rationale :

✍️ Formula:

➡️ Volume (mL) = Dose ordered (mg) ÷ Stock concentration (mg/mL)

✍️ Given:

➡️ Dose ordered = 15 mg

➡️ Stock = 50 mg/mL

✍️ Calculation:

➡️ Volume = 15 ÷ 50

↦ 0.3 mL

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Answer 4

Correct Answers:

1.8

Rationale :

✍️ Formula:

➡️ kg = lb ÷ 2.2

➡️Daily dose (mg) = mg/kg/day × kg

➡️Dose per dose (mg) = daily dose ÷ number of doses per day

➡️ Volume (mL) = (dose per dose ÷ stock mg) × stock mL

✍️ Given:

➡️ Weight = 40 lb

➡️Ordered dose = 100 mg/kg/day IM

➡️ Frequency = q4 hr → 6 doses/day

➡️ Stock = 250 mg/1.5 mL

✍️ Calculation:

➡️ kg = 40 ÷ 2.2 ≈ 18.2 kg

➡️ Daily dose = 100 × 18.2 ≈ 1,820 mg/day

➡️ Dose per dose = 1,820 ÷ 6 ≈ 303.3 mg

➡️ Volume = (303.3 ÷ 250) × 1.5

↦ 1.8 mL per dose

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Answer 5

Correct Answers:

3.9

Rationale :

✍️ Formula:

➡️ kg = lb ÷ 2.2

➡️ Daily dose (mg) = mg/kg/day × kg

➡️ Dose per dose (mg) = daily dose ÷ number of doses per day

➡️ Volume (mL) = (dose per dose ÷ stock mg) × stock mL

✍️ Given:

➡️ Weight = 26 lb

➡️ Ordered dose = 2 mg/kg/day PO

➡️ Frequency = q12 hr → 2 doses/day

➡️ Stock = 15 mg/5 mL

✍️ Calculation:

➡️ kg = 26 ÷ 2.2 ≈ 11.8 kg

➡️ Daily dose = 2 × 11.8 ≈ 23.6 mg/day

➡️ Dose per dose = 23.6 ÷ 2 ≈ 11.8 mg

➡️ Stock concentration = 15 mg/5 mL = 3 mg/mL

➡️ Volume = 11.8 ÷ 3

↦ 3.9 mL per dose

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Answer 6

Correct Answers:

1.5

Rationale :

✍️ Formula:

➡️ Dose per dose (mg) = Total daily dose ÷ number of doses per day

➡️ Volume (mL) = Dose per dose ÷ stock concentration (mg/mL)

✍️ Given:

➡️ Total daily dose = 36 mg/day

➡️ Frequency = 3 divided doses/day

➡️ Stock = 8 mg/mL

✍️ Calculation:

➡️ Dose per dose = 36 ÷ 3 = 12 mg

➡️ Volume = 12 ÷ 8

↦ 1.5 mL per dose

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Answer 7

Correct Answers:

2

Rationale :

✍️ Formula:

➡️ Volume (mL) = Dose ordered (units) ÷ Stock concentration (units/mL)

✍️ Given:

➡️ Dose ordered = 1,200,000 units

➡️ Stock solution = 600,000 units/mL

✍️ Calculation:

➡️ Volume = 1,200,000 ÷ 600,000

↦ 2 mL

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Answer 8

Correct Answers:

0.65

Rationale :

✍️ Formula:

➡️ kg = lb ÷ 2.2

➡️ Dose (mg) = mg/kg × kg

➡️ Volume (mL) = Dose (mg) ÷ Stock concentration (mg/mL)

✍️ Given:

➡️ Weight = 55 lb

➡️ Ordered dose = 0.13 mg/kg IM

➡️ Stock solution = 5 mg/mL

✍️ Calculation:

➡️ kg = 55 ÷ 2.2 = 25 kg

➡️ Dose = 0.13 × 25 = 3.25 mg

➡️ Volume = 3.25 ÷ 5

↦ 0.65 mL

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Answer 9

Correct Answers:

250

Rationale :

✍️ Formula:

➡️ mL/hr = Total volume (mL) ÷ Time (hr)

✍️ Given:

➡️ Total volume = 500 mL

➡️ Time = 2 hr

✍️ Calculation:

➡️ mL/hr = 500 ÷ 2

↦ 250 mL/hr

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Answer 10

Correct Answers:

60

Rationale :

✍️ Formula:

➡️ mg = g × 1,000

✍️ Given:

➡️ Ordered dose = 0.06 g PO

✍️ Calculation:

➡️ mg = 0.06 × 1,000

↦ 60 mg

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QLexNursing

2 :
A nurse is caring for an adolescent who is receiving 1 L of continuous IV infusion of 0.9% sodium chloride solution at 100 mL/hr. How long should the IV fluids take to infuse? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

3 :
A nurse is preparing to administer promethazine 15 mg IM to a child. The amount available is promethazine 50 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.)

8 :
A nurse is administering prochlorperazine 0.13 mg/kg IM to a child who weighs 55 lb. Available is prochlorperazine injection 5 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

9 :
A nurse is preparing to administer dextrose 5% in 0.9% sodium chloride 500 mL IV to infuse over 2 hr to a school-age child. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

10 :
A nurse is preparing to administer fluoxetine 0.06 g PO to an adolescent who has depression. The nurse should recognize that this is equivalent to how many mg? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

QLexNursing

2 : A nurse is caring for an adolescent who is receiving 1 L of continuous IV infusion of 0.9% sodium chloride solution at 100 mL/hr. How long should the IV fluids take to infuse? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

3 : A nurse is preparing to administer promethazine 15 mg IM to a child. The amount available is promethazine 50 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.)

8 : A nurse is administering prochlorperazine 0.13 mg/kg IM to a child who weighs 55 lb. Available is prochlorperazine injection 5 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

9 : A nurse is preparing to administer dextrose 5% in 0.9% sodium chloride 500 mL IV to infuse over 2 hr to a school-age child. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

10 : A nurse is preparing to administer fluoxetine 0.06 g PO to an adolescent who has depression. The nurse should recognize that this is equivalent to how many mg? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

2 :
A nurse is caring for an adolescent who is receiving 1 L of continuous IV infusion of 0.9% sodium chloride solution at 100 mL/hr. How long should the IV fluids take to infuse? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

3 :
A nurse is preparing to administer promethazine 15 mg IM to a child. The amount available is promethazine 50 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.)

8 :
A nurse is administering prochlorperazine 0.13 mg/kg IM to a child who weighs 55 lb. Available is prochlorperazine injection 5 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

9 :
A nurse is preparing to administer dextrose 5% in 0.9% sodium chloride 500 mL IV to infuse over 2 hr to a school-age child. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

10 :
A nurse is preparing to administer fluoxetine 0.06 g PO to an adolescent who has depression. The nurse should recognize that this is equivalent to how many mg? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)