A) The doctor orders 5000 Units of Heparin every 8 hours. The available solution contains 10,000 Units of Heparin per mL. How many

B) The doctor orders an injection of 20 mg of Vistaril every 4 – 6 hours for a child who weighs 44 lbs. The medication resource indicates that the usual dosage is 0.5 mg to 1.0 mg/kg/dose every 4 to 6 hours as needed. Is the doctor’s order a safe dosage?

C) The order is for 400 mg Zithromax in an IV. The supplied package of the drug contains 500 mg of powdered Zithromax with directions on the label as follows: “Reconstitute to 100 mg/mL with 4.8 mL of Sterile Water.” How many milliliters of the reconstituted solution should the nurse give the patient?