The healthcare provider prescribes interferon beta-1b 0.1875 mg every other day for a client with multiple sclerosis. The nurse receives a vial of powder labeled, "0.3 mg with 1.2 mL of sterile water." How many mL should the nurse administer to the client? (Enter the numerical value only. If rounding is required, round to the nearest hundredth.)

To calculate the volume of interferon beta-1b solution, we need to use the formula: Volume (mL) = Dose (mg) x Dilution factor (mL/mg) The dilution factor is the ratio of the volume of sterile water to the amount of powder in the vial. In this case, it is 1.2 mL / 0.3 mg. Plugging in the given values, we get: Volume (mL) = 0.1875 mg x 1.2 mL / 0.3 mg Simplifying, we get: Volume (mL) = 0.75 mL