An adult client with myasthenia gravis is receiving pyridostigmine (Mestinon) 126 mg PO every 4 hours. The drug is available as 60 mg in 5 ml syrup. How many ml should the nurse administer? (If rounding is required, round to the nearest tenth.)
The Correct Answer is ["10.5"]
To calculate the volume of pyridostigmine to be administered, we can use the following formula:
Volume (mL) = Desired Dose (mg) / Concentration (mg/mL)
However, the concentration is given in mg/5 mL. We need to convert it to mg/mL:
Concentration (mg/mL) = 60 mg / 5 mL = 12 mg/mL
Now, plug in the given values into the formula:
Volume (mL) = 126 mg / 12 mg/mL
Volume (mL) = 10.5 mL
Therefore, the nurse should administer 10.5 mL of pyridostigmine syrup.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
To calculate the number of tablets needed, we can set up a proportion:
x tablets / 0.05 mg = 1 tablet / 0.1 mg
Cross-multiplying:
0.1x = 0.05
Solving for x:
x = 0.05 / 0.1
x = 0.5
Therefore, the nurse should administer 0.5 tablets of levothyroxine sodium (Synthroid).
Since we cannot administer a fraction of a tablet, we round up to the nearest whole number.
So, the nurse should administer 1 tablet.
Correct Answer is ["3"]
Explanation
Calculating the Trimethoprim-Sulfamethoxazole Dose
Problem: Administer 120 mg of Bactrim-DS Oral Suspension. The available concentration is 200 mg/5 mL.
Steps:
Set up a proportion:
We want to find the number of milliliters (mL) needed.
We know the desired dose (120 mg) and the concentration of the medication (200 mg/5 mL).
Proportion:
x mL / 120 mg = 5 mL / 200 mg
Cross-multiply:
200x = 600
Solve for x:
x = 600 / 200
x = 3
Answer: The nurse should administer 3 mL of Bactrim-DS Oral Suspension per dose.
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