An adult client receives a prescription for diphenhydramine...

An adult client receives a prescription for diphenhydramine 15 mL by mouth every 12 hours PRN for pruritus. The bottle is labeled, diphenhydramine 12.5 mg/5 mL. What is the total daily dose in mg that the client receives? (Enter numerical value only.)

Correct Answer: 75

Rationale: To find the total daily dose, calculate the mg per dose: 12.5 mg/5 mL means 15 mL contains (12.5 Ã— 15) / 5 = 37.5 mg. The prescription allows two doses daily (every 12 hours PRN), so 37.5 Ã— 2 = 75 mg/day.

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The healthcare provider prescribes a hydration infusion of normal saline to run over 3 hours at 30 mL/kg for a client who is dehydrated and weighs 70 kg. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only.)

Correct Answer: 700

Rationale: Volume: 30 mL/kg Ã— 70 kg = 2100 mL. Infusion rate = 2100 / 3 = 700 mL/hour.

The nurse is preparing to administer methylprednisolone 40 mg IV. The medication vial is labeled '125 mg per 2 mL.' How many mL of medication should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest hundredth.)

Correct Answer: 0.64

Rationale: Concentration: 125 mg / 2 mL = 62.5 mg/mL. Volume = 40 / 62.5 = 0.64 mL.

A child who weighs 42 kg receives a prescription for methylprednisolone succinate 1.5 mg/kg/day intravenously in divided doses every 6 hours. The medication is available in 40 mg/mL vials. How many mL should the nurse administer with each dose? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Correct Answer: 0.4

Rationale: Daily dose: 1.5 mg/kg/day Ã— 42 = 63 mg/day. Per dose (every 6 hours, 4 doses/day): 63 / 4 = 15.75 mg. Volume: 15.75 / 40 = 0.39375 mL, rounded to 0.4 mL.

A child is to receive vancomycin 40 mg/kg intravenously one hour before a scheduled procedure. The child weighs 44 pounds. How many mg of the medication should the nurse administer? (Enter numeric value only.)

Correct Answer: 798

Rationale: Weight: 44 Ã— 0.4536 = 19.9584 kg. Dose: 40 mg/kg Ã— 19.9584 = 798.336 mg, rounded to 798.

The healthcare provider prescribes an IV bolus of diltiazem 0.25 mg/kg for a client with atrial fibrillation. The client weighs 178 pounds. How many mg should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest whole number.)

Correct Answer: 20

Rationale: Weight: 178 pounds / 2.2 = 80.91 kg. Dose: 0.25 mg/kg Ã— 80.91 = 20.2275 mg, rounded to 20 mg.