Question

A provider order is written for prochlorperazine (Compazine®) 7.5 mg IV q 4 hrs prn N/V. Prochlorperazine (Compazine®) is available in a prefilled syringe labeled 10 mg/2 mL. How many milliliters should be given?

Answer 1

Answer:

1.5 ml

Explanation:

Given that;

A provider order is written for prochlorperazine (Compazine®) 7.5 mg

That represents the desired dose (D)= 7.5 mg

Prochlorperazine (Compazine®) is available in a prefilled syringe labeled 10 mg/2 mL

The dose at hand = 10 mg

The quantity in milliliters = 2mL

To calculate the amount of milliliters that is required to be given; we use the following expression = $\frac{desried dose}{dose in hand}*quantity in milliliters$

= $\frac{7.5}{10}*2$

= 0.75 × 2

= 1.5 ml

The amount of milliliters that is required to be given = 1.5 ml

Answer 2

Answer:

The milliliters of prochlorperazine (Compazine®) that must be supplied are:

• 1.5 milliliters.

Explanation:

Since the pre-filled syringe carries a label that specifies 10 mg / 2 ml, it can be deduced that the syringe contains 10 mg of the medicine in the 2 mL that is evident in the syringe, therefore, with these data and taking into account that the recommended dose in the order is 7.5 mg, a simple rule of three can be performed with the data obtained:

• 10 mg = 2 mL
• 7.5 mg = X

Then we proceed to calculate X:

• X = (7.5 * 2) / 10
• X = 15/10
• X = 1.5 mL

1.5 milliliters is the dose that must be supplied every four hours following the indications in the order.