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A nurse is preparing to administer valproic acid 400 tog PO bid for migraine headaches. Available is valproic acid 250 mg/5mL. 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 ["8"]

Step 1: Determine the ratio of milligrams per millilitre from the available valproic acid.
The available valproic acid is labelled "250 mg/5 mL." This means that for every 5 mL of the solution, there are 250 milligrams of valproic acid.

Step 2: Calculate the number of millilitres needed for 400 milligrams.
We can set up a proportion to solve for the unknown number of millilitres:

(250 mg) / (5 mL) = (400 mg) / (x mL)
Cross-multiplying:
250 mg * x mL = 5 mL * 400 mg

Step 3: Solve for x (the number of millilitres).
Divide both sides of the equation by 250 mg:

x mL = (5 mL * 400 mg) / (250 mg)
x mL = 8 mL


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Related Questions

Correct Answer is ["100"]

Explanation

Here's how to calculate the IV pump rate:

1. Calculate the total infusion time in hours:
30 minutes / 60 minutes/hour = 0.5 hours

2. Calculate the infusion rate:
Total volume (mL) / Infusion time (hours) = Infusion rate (mL/hr)
50 mL / 0.5 hours = 100 mL/hr

Correct Answer is ["2"]

Explanation

Step 1: Determine the ratio of micrograms per tablet from the available levothyroxine.
The available tablets are labelled "50 mcg/tablet." This means that for every 1 tablet, there are 50 micrograms of levothyroxine.

Step 2: Calculate the number of tablets needed for 100 micrograms.
We can set up a proportion to solve for the unknown number of tablets:

(50 mcg) / (1 tablet) = (100 mcg) / (x tablets)
Cross-multiplying:
50 mcg x x tablets = 1 tablet x 100 mcg

Step 3: Solve for x (the number of tablets).
Divide both sides of the equation by 50 mcg:
x tablets = (1 tablet x 100 mcg) / (50 mcg)
x tablets = 2 tablets

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