A nurse is preparing to administer phenytoin 300 mg PO every 12 hr to a client who has a seizure disorder. Available is phenytoin oral suspension 125 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 and Explanation

The Correct Answer is ["12"]

To calculate the dose of phenytoin oral suspension for a client with a seizure disorder, the nurse needs to use the following formula:

Dose (mL) = Ordered dose (mg) / Concentration (mg/mL)

In this case, the ordered dose is 300 mg and the concentration is 125 mg/5 mL. Therefore, the dose in mL is:

Dose (mL) = 300 mg / (125 mg/5 mL)

Dose (mL) = 300 mg x (5 mL/125 mg)

Dose (mL) = 12 mL

The nurse should round the answer to the nearest whole number, which is 12 mL. The nurse should administer 12 mL of phenytoin oral suspension every 12 hours to the client.

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Free Nursing Study Resources

Correct Answer is ["2"]

Explanation

To give the correct dose of levothyroxine, the nurse needs to calculate how many tablets of 75 mcg are equivalent to 150 mcg. The nurse can use a proportion to solve this problem. Let x be the number of tablets to administer. Then, the proportion is:

75 mcg / 1 tablet = 150 mcg / x tablets

Cross-multiplying, we get:

75x = 150

Dividing both sides by 75, we get:

x = 2
Therefore, the nurse should administer 2 tablets of levothyroxine 75 mcg to give a total of 150 mcg.

Correct Answer is ["3"]

Explanation

To calculate the dose of calcitonin for a client who weighs 165 lb, the nurse needs to convert the weight to kilograms first.

One kilogram is equal to 2.2 lb, so the client's weight in kilograms is 165 / 2.2 = 75 kg.

The prescribed dose is 8 units/kg, so the total dose is 8 x 75 = 600 units.

The available concentration is 200 units/mL, so the volume to administer is 600 / 200 = 3 mL.

The nurse should administer 3 mL of calcitonin IM to the client.

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Naxlex Comprehensive Predictor Exams

A nurse is preparing to administer levothyroxine 150 mcg PO. Available is levothyroxine 75 mcg tablets. How many tablets 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 ["2"]

Explanation

A nurse is preparing to administer calcitonin 8 units/kg IM to a client who weighs 165 lb. Available is 200 units/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 ["3"]

Explanation

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