How many milliliters of cefazolin 500mg/mL should a pharmacy technician use to prepare a syringe that contains one 1 g of cefazolin?

To determine how many milliliters of cefazolin 500 mg/mL are needed to prepare a syringe containing 1 g of cefazolin, it is essential to convert grams to milligrams since the concentration is given in mg/mL.

1 g is equivalent to 1000 mg. Since the concentration of the cefazolin solution is 500 mg/mL, you can find the volume required by using the formula:

Volume (mL) = Amount needed (mg) / Concentration (mg/mL).

Substituting the values:

Volume (mL) = 1000 mg / 500 mg/mL = 2 mL.

Thus, to obtain 1 g (or 1000 mg) of cefazolin from a solution that has a concentration of 500 mg/mL, a pharmacy technician would need to measure out 2 mL of the solution. This calculation ensures that the correct dosage is prepared for administration, following safe and effective pharmacy practices.