ATI LPN
ATI LPN Pharmacology Exam Questions
Extract:
Question 1 of 5
A continuous heparin infusion is to begin at 15 units/kg/hr for a client weighing 82 kg. Available: 25,000 units of heparin in 250 mL D5W. Calculate the mL/hr. (the pump is capable of delivering in tenths of an mL).
Correct Answer: A
Rationale:
Total dose = 15 units/kg/hr × 82 kg = 1230 units/hr. Concentration = 25,000 units / 250 mL = 100 units/mL. Infusion rate = 1230 / 100 = 12.3 mL/hr.
Question 2 of 5
Which product is the antidote for digitalis toxicity?
Correct Answer: D
Rationale: Digoxin immune fab binds digoxin to reverse toxicity.
Question 3 of 5
A physician ordered 1/4 strength Isomil 12 oz via nasogastric tube over 6 hours. How much solvent (water) will be needed?
Correct Answer: B
Rationale:
Total volume = 12 oz × 29.5735 = 354.88 mL. Isomil = 354.88 × 1/4 = 88.72 mL. Water = 354.88 - 88.72 = 266.16 mL, rounded to 270 mL.
Question 4 of 5
A client who is taking digoxin asks the nurse if they can take an antacid for heartburn. What is the nurse's best response?
Correct Answer: C
Rationale: Antacids reduce digoxin absorption; spacing by 2 hours prevents interaction.
Question 5 of 5
What factors affect physiological response to drug use?
Correct Answer: A
Rationale: Age, weight, and sex directly influence drug absorption, metabolism, and excretion.