How many milligrams are in each milliliter of a reconstituted Cefazolin (Kefzol) solution if 1 gram is reconstituted in 2.5 mL?

To determine how many milligrams of Cefazolin are in each milliliter of the reconstituted solution, it’s essential to first convert grams to milligrams. One gram is equal to 1000 milligrams. Therefore, if 1 gram of Cefazolin is used, it converts to 1000 milligrams.

Next, since this 1000 milligrams is dissolved in 2.5 milliliters of solution, the concentration can be calculated by dividing the total milligrams by the total volume in milliliters.

So, the calculation is as follows:

• Total milligrams of Cefazolin = 1000 mg

• Total volume = 2.5 mL

Now, dividing the total milligrams by the volume:

1000 mg ÷ 2.5 mL = 400 mg/mL

This shows that there are 400 milligrams of Cefazolin in each milliliter of the reconstituted solution. Therefore, the correct choice aligns with this calculation, confirming that the concentration of the reconstituted Cefazolin solution is indeed 400 mg/mL.