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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 ["2"]

Explanation

To calculate the correct dosage, let's use the following steps:

Step 1: Determine the ratio of milligrams per capsule from the available capsules.

The available capsules are labelled "25 mg/capsule." This means that for every 1 capsule, there are 25 milligrams of chlordiazepoxide.

Step 2: Calculate the number of capsules needed for 50 milligrams.

We can set up a proportion to solve for the unknown number of capsules:

(25 mg) / (1 capsule) = (50 mg) / (x capsules)

Cross-multiplying:

25 mg x x capsules = 1 capsule x 50 mg

Step 3: Solve for x (the number of capsules).

Divide both sides of the equation by 25 mg:

x capsules = (1 capsule x 50 mg) / (25 mg)

x capsules = 2 capsules

Correct Answer is ["8"]

Explanation

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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