Final answer:
To administer 2.5 mg of haloperidol when the concentration available is 5 mg/mL, you would give 0.5 mL of the solution.
Step-by-step explanation:
If a client in the emergency department becomes agitated and is prescribed haloperidol (Haldol) 2.5 mg IM, and the available concentration is 5 mg/mL, the amount of solution needed can be calculated as follows:
The prescription is for 2.5 mg of haloperidol, and the available vial concentration is 5 mg in every 1 mL. Using a simple calculation, divide the prescribed dose of 2.5 mg by the concentration of 5 mg/mL:
Dose (mg) / Concentration (mg/mL) = Volume (mL)
2.5 mg / 5 mg/mL = 0.5 mL
Therefore, you need to administer 0.5 mL to deliver the 2.5 mg dose of haloperidol.