Examkin

Question

Difficulty: EasyPharmacological and Parenteral Therapies

A healthcare provider orders haloperidol 5 mg5\text{ mg} intramuscularly for an agitated adult client. The pharmacy dispenses a multi-dose vial labeled haloperidol 2 mg/mL2\text{ mg/mL}. How many  mL\text{ mL} should the nurse draw up to administer the correct dose? Record your answer using one decimal place.

Answer: 2.5 mL

Answer

2.5
Using the standard formula of (Desired / Have) × Volume, dividing the prescribed 5 mg5\text{ mg} by the available concentration of 2 mg2\text{ mg} yields exactly 2.5 mL2.5\text{ mL}.

Step-by-Step Solution

1
Identify the standard formula for liquid medication calculations.
Formula: DesiredHave×Volume\frac{\text{Desired}}{\text{Have}} \times \text{Volume}
This standard formula ensures accurate conversion from the prescribed mass to the required physical volume.
2
Extract the given values from the prescription and the medication label.
Desired = 5 mg5\text{ mg}; Have = 2 mg2\text{ mg}; Volume = 1 mL1\text{ mL}.
Mapping the known values correctly into the formula prevents fundamental calculation errors.
3
Substitute the values into the formula and solve the equation.
5 mg2 mg×1 mL=2.5 mL\frac{5\text{ mg}}{2\text{ mg}} \times 1\text{ mL} = 2.5\text{ mL}.
Dividing 55 by 22 yields exactly 2.52.5, which represents the correct volume in mL\text{mL}.

Key Concept

Basic Parenteral Medication Dosage Calculation
Rate this question

Topics

Pharmacological and Parenteral Therapies

More questions from this topic