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Medication calculation nr 226 proctored exam

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Total Questions : 18

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Question 1:

The client has an order for sulfasalazine 1.5 g orally. The medication available is sulfasalazine 500 mg/scored tablet. How many tablets will the nurse administer?

_______ tablet(s) (If needed, round to the nearest whole number.)

Answer and Explanation
Correct Answer: "3" tablets

Explanation

Calculation:

  • Identify the ordered dose and tablet strength

Ordered Dose: 1.5 g (1500 mg)

Tablet Strength: 500 mg per tablet

  • Calculate the number of tablets to administer

Number of Tablets = Ordered Dose ÷ Tablet Strength

Number of Tablets = 1500 ÷ 500

Number of Tablets = 3


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Question 2:

The client has an order for atropine 100 mcg subcutaneously. The medication available is atropine 1 mg/0.7 mL. How many mL will the nurse administer?

________ mL (If needed, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "0.1" mL

Explanation

Calculation:

  • Identify the ordered dose and available concentration

Ordered Dose: 100 mcg (0.1 mg)

Available Concentration: 1 mg/0.7 mL

  • Calculate the volume to administer

Volume to administer = (Ordered Dose ÷ Concentration) × Volume of Concentration

Volume to administer = (0.1 ÷ 1) × 0.7

Volume to administer = 0.1 × 0.7

Volume to administer = 0.07 mL

  • Round to the nearest tenth

= 0.1 mL


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Question 3:

The client has an order for digoxin 125 mcg orally. The medication available is digoxin 0.25 mg/scored tablet. How many tablets will the nurse administer?

______tablet(s) (If needed, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "0.5" tablets

Explanation

Calculation:

  • Identify the ordered dose and tablet strength

Ordered Dose: 125 mcg (0.125 mg)

Tablet Strength: 0.25 mg per tablet

  • Calculate the number of tablets to administer

Number of Tablets = Ordered Dose ÷ Tablet Strength

Number of Tablets = 0.125 ÷ 0.25

= 0.5


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Question 4:

The client has an order for potassium 60 mEq orally. The medication available is potassium 40 mEq/15 mL. How many mL will the nurse administer?

_______ mL (lf needed, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "22.5" mL

Explanation

Calculation:

  • Identify the ordered dose and available concentration

Ordered Dose: 60 mEq

Available Concentration: 40 mEq/15 mL

  • Calculate the volume to administer

Volume to administer = (Ordered Dose ÷ Concentration) × Volume of Concentration

Volume to administer = (60 ÷ 40) × 15

Volume to administer = 1.5 × 15

= 22.5 mL


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Question 5:

The healthcare provider ordered enoxaparin 1 mg/kg subcutaneously. The medication available is enoxaparin 80 mg/mL. The client weighs 242 lbs. How many mL will the nurse administer?

_______mL (If needed, round to the nearest tenth.

Answer and Explanation
Correct Answer: "1.4" mL

Explanation

Calculation:

  • Identify the ordered dose, client weight, and available concentration

Ordered Dose: 1 mg/kg

Client Weight: 242 lbs (convert to kg: 242 ÷ 2.2 = 110 kg)

Available Concentration: 80 mg/mL

  • Calculate the total dose in mg

Total Dose = 1 × 110

= 110 mg

  • Calculate the volume to administer

Volume to administer = Total Dose ÷ Concentration

Volume to administer = 110 ÷ 80

Volume to administer = 1.375 mL

  • Round to the nearest tenth

= 1.4 mL


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Question 6:

The client has an order for morphine 10 mg orally. The medication available is morphine 10 mg/5 mL. How many teaspoons will the nurse administer?

________ tsp (If needed, round to the nearest whole number.)

Answer and Explanation
Correct Answer: "1" teaspoon

Explanation

Calculation:

  • Identify the ordered dose and available concentration

Ordered Dose: 10 mg

Available Concentration: 10 mg/5 mL

  • Calculate the volume to administer in mL

Volume to administer = Ordered Dose ÷ Concentration × Volume of Concentration

Volume to administer = (10 ÷ 10) × 5

Volume to administer = 5 mL

  • Convert mL to teaspoons

1 teaspoon = 5 mL

Volume in teaspoons = 5 ÷ 5

= 1 tsp


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Question 7:

The healthcare provider ordered cyclosporine IV 4 mg/kg/day. The client weighs 156 lbs. How many mg will the nurse administer each day?

_________mg (If needed, round to the nearest whole number.)

Answer and Explanation
Correct Answer: "284" mg/day

Explanation

Calculation:

  • Identify the prescribed dose and client weight

Prescribed Dose: 4 mg/kg/day

Client Weight: 156 lbs

convert to kg: 156 ÷ 2.2

= 70.9 kg

  • Calculate the total daily dose

Total Dose = 4 × 70.9

Total Dose = 283.6 mg/day

  • Round to the nearest whole number

= 284 mg/day


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Question 8:

The client has an order for gabapentin 175 mg orally. The medication available is gabapentin 250 mg/5 mL. How many mL will the nurse administer?

________ mL (lf needed, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "3.5" mL

Explanation

Calculation:

  • Identify the ordered dose and available concentration

Ordered Dose: 175 mg

Available Concentration: 250 mg/5 mL

  • Calculate the volume to administer

Volume to administer = (Ordered Dose ÷ Concentration) × Volume of Concentration

Volume to administer = (175 ÷ 250) × 5

Volume to administer = 0.7 × 5

= 3.5 mL


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Question 9:

The client has an order for hydrochlorothiazide 37.5 mg orally. The medication available is hydrochlorothiazide 25 mg/scored tablet. How many tablets will the nurse administer?

________ tablet(s) (If needed, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "1.5" tablets

Explanation

Calculation:

  • Identify the ordered dose and tablet strength

Ordered Dose: 37.5 mg

Tablet Strength: 25 mg per tablet

  • Calculate the number of tablets to administer

Number of Tablets = Ordered Dose ÷ Tablet Strength

Number of Tablets = 37.5 ÷ 25

= 1.5


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Question 10:

The client has an order for digoxin 0.1 mg IVP. The medication available is digoxin 250 mcg/mL. How many mL will the nurse administer?

_______ mL (lf needed, round to the nearest tenth.)

Answer and Explanation
Correct Answer: "0.4" mL

Explanation

Calculation:

  • Identify the ordered dose and available concentration

Ordered Dose: 0.1 mg (100 mcg)

Available Concentration: 250 mcg/mL

  • Calculate the volume to administer

Volume to administer = Ordered Dose ÷ Concentration

Volume to administer = 100 ÷ 250

= 0.4 mL


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