A nurse is preparing to administer nafcillin 500 mg IM to a client. The amount available is nafcillin 1 g powder. The package insert instructs reconstituting with 3.4 mL of sterile water to yield nafcillin 250 mg/mL. 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.)

Answer and Explanation

The Correct Answer is ["2"]

To calculate the dosage of nafcillin, use the formula: D/H x Q = X, where D is the desired dose, H is the on-hand dose, Q is the quantity of the solution, and X is the amount to administer.

In this case, D = 500 mg, H = 250 mg/mL, Q = 1 mL, and X is unknown.

Plug in the values and solve for X: 500/250 x 1 = 2

Round the answer to the nearest whole number: 2 mL

The nurse should administer 2 mL of nafcillin to the client.

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Free Nursing Study Resources

Correct Answer is B

Explanation

A. Fentanyl patches are commonly used for chronic pain management. A dose of 25 mcg/hr is within the standard dosing range for patients who are opioid-tolerant. No clarification is typically needed for this prescription.
B. Regular insulin 8 units subcutaneous before meals is a vague and potentially dangerous prescription. Regular insulin is a short-acting insulin that lowers blood glucose levels by facilitating the uptake of glucose into the cells. The dose of insulin should be individualized based on the client's blood glucose level, carbohydrate intake, and activity level. The nurse should contact the provider for clarification on how to adjust the dose according to the client's needs.
C. Meloxicam 15 mg PO daily: This is a standard and appropriate dosage for a nonsteroidal anti-inflammatory drug (NSAID) used for pain and inflammation.
D. Docusate sodium 200 mg PO at bedtime: This is a standard and appropriate dosage for a stool softener used to prevent constipation.

Correct Answer is ["10"]

Explanation

To calculate the dose of amoxicillin oral suspension, use the formula: Dose (mL) = Desired (mg) / Available (mg/mL) x Volume (mL)

Plug in the values from the question: Dose (mL) = 775 mg / (400 mg/5 mL) x 5 mL

Simplify and solve: Dose (mL) = 9.6875 mL

Round to the nearest whole number: Dose (mL) = 10 mL

The nurse should administer 10 mL of amoxicillin oral suspension.

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Naxlex Comprehensive Predictor Exams

A nurse is reviewing medications prescribed for a client. For which of the following prescriptions should the nurse contact the provider for clarification?

Correct Answer is B

Explanation

A nurse is preparing to administer amoxicillin 775 mg PO. Available is amoxicillin oral suspension 400 mg/5 mL. 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.)

Correct Answer is ["10"]

Explanation

A nurse is preparing to administer acetylcysteine 140 mg/kg PO stat to a client who weighs 178 lb. Available is acetylcysteine 200 mg/mL. 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.)

A nurse is preparing to administer acetylcysteine 140 mg/kg PO stat to a client who weighs 178 lb. Available is acetylcysteine 200 mg/mL. 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.)

A nurse is preparing to administer furosemide 0.1 mg/kg via IV bolus to a client who weighs 183 lb. Available is furosemide 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.)

A nurse is preparing to administer digoxin 750 mcg IV bolus. How many mg should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)