Using a vial containing 300,000 units of penicillin G...

Using a vial containing 300,000 units of penicillin $G$ potassium, how many milliliters of sterile water for injection should be added to the dry powder in preparing a solution having a concentration of 30,000 units $/ \mathrm{mL}$ ?

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Key Concepts

Solution Concentration

This concept involves understanding how the concentration of a solution is defined as the amount of solute per unit volume of solution. It is a fundamental idea in pharmacy where the dosage and efficacy of a drug depend on accurately preparing solutions with specified concentrations.

Dilution Calculation

Dilution calculation is the process used to determine the required volume of solvent to add to a given amount of solute in order to achieve a desired concentration. This typically involves dividing the total amount of solute by the target concentration, thereby ensuring that the final solution contains the correct proportion of the active ingredient per unit volume.

Pharmaceutical Reconstitution

Pharmaceutical reconstitution refers to the process of converting a powdered medication into a liquid form by adding an appropriate amount of diluent. This procedure is critical for ensuring safe and effective drug administration, as it allows for the precise measurement of dosage based on the concentration achieved through proper dilution.

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