How many doses of Vistaril 25 mg IM are available in a 10 ml multidose vial of vistaril 50 mgml?

A 10 mL multidose vial of Vistaril (hydroxyzine) at a concentration of 50 mg/mL contains a total of 500 mg of the medication. Since each dose of Vistaril is 25 mg, you can obtain 20 doses from the vial (500 mg ÷ 25 mg per dose = 20 doses).