0.4 mL of Haloperidol corresponds to how many mg, given a 50 mg/mL concentration?

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Multiple Choice

0.4 mL of Haloperidol corresponds to how many mg, given a 50 mg/mL concentration?

When you have a solution with a concentration in mg per mL and a volume in mL, the total amount of drug is found by multiplying the two: concentration × volume. Here, 50 mg/mL means 50 mg per every 1 mL. Multiply by 0.4 mL: 50 mg/mL × 0.4 mL = 20 mg. The units of mL cancel, leaving mg. So the dose is 20 mg. A quick cross-check: 0.4 mL is 40% of 1 mL, and 40% of 50 mg is 20 mg, which matches the calculation.

When you have a solution with a concentration in mg per mL and a volume in mL, the total amount of drug is found by multiplying the two: concentration × volume. Here, 50 mg/mL means 50 mg per every 1 mL. Multiply by 0.4 mL: 50 mg/mL × 0.4 mL = 20 mg. The units of mL cancel, leaving mg. So the dose is 20 mg. A quick cross-check: 0.4 mL is 40% of 1 mL, and 40% of 50 mg is 20 mg, which matches the calculation.

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