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Author Question: The health care provider prescribes Solu-Medrol 100 mg. The medication is supplied as 125 mg in 2 ... (Read 70 times)

faduma

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on: Jun 25, 2018
The health care provider prescribes Solu-Medrol 100 mg. The medication is supplied as 125 mg in 2 mL.
 
  The nurse calculates the dosage using the ratio and proportion method. How many mL of medication would the nurse administer to equal 100 mg?
 
  ____ mL
 
  Record the answer rounding to the nearest tenth.

Question 2

The health care provider prescribes Ampicillin 850 mg p.o. The medication is supplied as 1,000 mg per 5 mL.
 
  How many mL of medication would the nurse administer using the basic formula?
 
  ____ mL
 
  Record the answer rounding to the nearest hundredth.


cclemon1

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Reply #1 on: Jun 25, 2018
Answer to Question 1

Correct Answer: 1.6

Using the ratio and proportion method, the amount on hand is placed on one side of the equation whereas the dosage desired is placed on the other side of the equation. The dose on hand is 125 mg in 5 mL. In ratio format, this would be 125:5. The dosage desired is 100 mg, but the amount of medication required for this dosage is unknown, so it would be put in ratio format as 100:x. It is essential when setting up the ratio that weight is on the same side of the ratio on both sides of the equation and the volume is on the same side as well. The equation would be 125:5 = 100:x. The values on the outsides of the equation are multiplied (125 X x) and the values on the inside are multiplied (5 X 100), resulting in the following equation: 125 X x = 5 X 100. 125x = 500. Dividing both sides by 125 to leave the x standing alone on one side results in x = 500  125, or x = 1.6 mL.

Answer to Question 2

Correct Answer: 4.25

The desired dose is 850 mg. The dose on hand is 1,000 mg, and the vehicle is 5 mL. The formula is D X V  H, or 850 X 5  1,000. 850 X 5 = 4,250  1,000 = 4.25


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