A nurse is preparing to administer phenytoin 200 mg PO to a client. Available is phenytoin oral suspension 125 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.)
The Correct Answer is ["8"]
To calculate the dose of phenytoin oral suspension, the nurse should use the following formula:
Dose (mL) = Desired dose (mg) / Concentration (mg/mL) x Volume (mL)
Plugging in the values from the question, we get:
Dose (mL) = 200 mg / 125 mg/5 mL x 5 mL
Simplifying the equation, we get:
Dose (mL) = 8 mL
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Related Questions
Correct Answer is ["8"]
Explanation
To give the client the correct dose of phenytoin, the nurse needs to calculate the volume of the oral suspension that contains 200 mg of the drug. The formula for this calculation is:
Volume (mL) = Dose (mg) / Concentration (mg/mL)
The concentration of the oral suspension is 125 mg/5 mL, which means that 1 mL contains 25 mg of phenytoin. Therefore, the nurse can substitute these values into the formula:
Volume (mL) = 200 mg / 25 mg/mL
Volume (mL) = 8 mL
Therefore, the nurse should administer 8 mL of the oral suspension to the client.
Correct Answer is ["7"]
Explanation
To calculate the correct dosage of levothyroxine, the nurse should follow these steps:
- Convert the patient's weight from pounds to kilograms: 220 lb ÷ 2.20462 lb/kg = 99.79 kg
- Calculate the total dose of levothyroxine: 5 mcg/kg × 99.79 kg = 498.95 mcg
- Determine the number of tablets to administer: 498.95 mcg ÷ 75 mcg/tablet = 6.65 tablets
Therefore, the nurse should administer 7 tablets of levothyroxine.
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