According to the package insert enclosed with a penicillin G potassium vial, the reconstituted solution is prepared by dissolving 250,000 units and the dry powder accounts for $1 \mathrm{~mL}$ increase in the final volume. Based on this information, how would you obtain the antibiotic required to compound the following prescription?
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R. & \\
Penicillin G potassium & 250,000 units \\
Diluent ad & Q.S. \\
Make solution containing 25,000 units $/ \mathrm{mL}$
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