ATI LPN
ATI LPN Pharmacology Exam Questions
Extract:
Question 1 of 5
A Nitroglycerin drip is infusing at 3 mL/hr. the available solution is 50 mg of Nitroglycerin in 250 mL D5W. Calculate the following: mcg/hr
Correct Answer: A
Rationale: Concentration = 50 mg / 250 mL = 200 mcg/mL. Dose = 3 mL/hr × 200 mcg/mL = 600 mcg/hr.
Question 2 of 5
CALCULATE FLOW RATES IN DROPS PER MINUTES: Order: Zosyn 1.3 g in 100 mL D5W IVPB 98h to infuse over 30 min. Drop factor: 60 gtt/mL. Determine rate in gtt/min.
Correct Answer: C
Rationale: Flow rate = (100 mL / 30 min) × 60 gtt/mL = 200 gtt/min.
Question 3 of 5
A nurse is preparing to administer amoxicillin 30 mg/kg/day divided doses every 12 hr to a toddler who weighs 33 lb. Available is amoxicillin 200 mg/5 mL suspension. How many mL should the nurse administer every 12 hr? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: B
Rationale: Weight = 33 lb × 0.453592 = 14.97 kg. Daily dose = 30 mg/kg/day × 14.97 kg = 449.1 mg. Per dose = 449.1 / 2 = 224.55 mg. Volume = 224.55 × (5 mL / 200 mg) = 5.61 mL, rounded to 5.6 mL.
Question 4 of 5
Which factors may affect drug absorption? (SELECT ALL THAT APPLY)
Correct Answer: A,B,C,E
Rationale: A: Affects absorption speed. B: Enhances permeability. C: Impacts solubility. E: Alters absorption rate. D relates to inhalation, not general absorption.
Question 5 of 5
Calculate the following dosage using ratio and proportions method. Round answers to the nearest tenth. Order: Tegretol 200 mg p.o.t.i.d. Available
Correct Answer: B
Rationale: Assuming 100 mg tablets (implied), 200 mg / 100 mg/tab = 2 tablets.