An order for Haloperidol 20 mg is to be given. The available concentration is 50 mg/mL. How many milliliters should you administer?

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Multiple Choice

An order for Haloperidol 20 mg is to be given. The available concentration is 50 mg/mL. How many milliliters should you administer?

To determine how much to give, use the formula: volume = dose ÷ concentration. The ordered dose is 20 mg, and the solution concentration is 50 mg per 1 mL. So the volume to administer is 20 mg ÷ 50 mg/mL = 0.4 mL. This matches the required dose because 0.4 mL × 50 mg/mL = 20 mg. If you used 0.2 mL, you’d give 10 mg; 1.0 mL would be 50 mg; 0.8 mL would be 40 mg.

To determine how much to give, use the formula: volume = dose ÷ concentration. The ordered dose is 20 mg, and the solution concentration is 50 mg per 1 mL. So the volume to administer is 20 mg ÷ 50 mg/mL = 0.4 mL. This matches the required dose because 0.4 mL × 50 mg/mL = 20 mg. If you used 0.2 mL, you’d give 10 mg; 1.0 mL would be 50 mg; 0.8 mL would be 40 mg.

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