A nurse is preparing to administer phenelzine 90 mg PO divided in three equal doses daily to a client who has depression. Available is phenelzine 15 mg tablets. How many tablets should the nurse administer per day? (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 ["6"]
Step-by-Step Calculation
Understanding the Problem
Total daily dose of phenelzine: 90 mg
Divided into 3 equal doses
Strength of each tablet: 15 mg
We need to find the total number of tablets per day.
Calculations
Calculate the dose per administration:
Dose per administration = Total daily dose / Number of doses
Dose per administration = 90 mg / 3 = 30 mg
Calculate the number of tablets per dose:
Tablets per dose = Dose per administration / Tablet strength
Tablets per dose = 30 mg / 15 mg/tablet = 2 tablets
The nurse should administer 2 tablets per day.
Since the client will receive 2 tablets per dose and will take 3 doses per day, the total number of tablets for the day is:
2 tablets/dose × 3 doses/day = 6 tablets/day
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Bupropion 150 mg PO once per day:
Bupropion 150 mg once daily is a common starting dose, especially for extended-release formulations. This dose is within the recommended range and does not require clarification.
B. Ibuprofen 200 mg PO q4 to 6 hr PRN pain:
Ibuprofen 200 mg every 4 to 6 hours as needed for pain is consistent with typical dosing guidelines for over-the-counter ibuprofen. This prescription is standard and does not require clarification.
C. Fluoxetine 20 mg PO QD:
Fluoxetine 20 mg daily (QD) is a standard starting dose for treating depression. This prescription is appropriate and aligns with common treatment guidelines.
D. Zolpidem 1.75 mg PO PRN at bedtime:
The standard dose for zolpidem is typically 5 mg to 10 mg taken at bedtime for the treatment of insomnia. A dose of 1.75 mg is unusual and lower than the usual recommended dose. Clarification is needed to ensure the dose is correct and appropriate for the client’s needs.
Correct Answer is ["3"]
Explanation
The nurse should administer 3 mL of benztropine mesylate.
Step-by-Step Calculation
Understanding the Problem
Desired dose: 3 mg benztropine mesylate
Available concentration: 1 mg/mL benztropine mesylate
Setting Up the Equation
We can use the following formula:
Desired dose (mg) = Concentration (mg/mL) X Volume (mL)
We need to find the volume (mL).
Calculating the Volume
3 mg = 1 mg/mL X Volume (mL)
To isolate Volume, we divide both sides by 1 mg/mL:
Volume (mL) = 3 mg / (1 mg/mL)
Volume (mL) = 3 mL
The nurse should administer 3 mL of benztropine mesylate.
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