Pharmacological & Parenteral Therapies for the NCLEX-RN Exam

Common failure modes

These are the patterns that cause most candidates to lose marks on this topic. Recognising them in advance is half the work.

• !Memorising drug names without mechanism — NCLEX questions test "what to monitor" not "what is this drug"
• !Confusing similar-sounding drugs (e.g., hydralazine vs hydroxyzine; clonidine vs Klonopin)
• !Missing the priority intervention when two side effects are presented
• !Wrong unit conversions in IV-calculation items (mL/hr ↔ gtt/min ↔ mcg/kg/min)

Study tips

• 1Group drugs by class first: ACE inhibitors all end in -pril; beta blockers in -olol; PPIs in -prazole.
• 2Drill 10 IV calculation problems daily — units, drip rates, and titration are highly testable.
• 3For each high-priority drug, learn three things: mechanism, top side effect, top nursing teaching point.
• 4Memorize the "look-alike / sound-alike" pairs that ISMP publishes annually.

Sample NCLEX-RN Pharmacological & Parenteral Therapies questions

These sample items mirror the format and difficulty of real NCLEX-RN questions. Practice with thousands more on the free Koydo question bank.

1. 1

   A nurse is administering furosemide 40 mg IV push. Which lab value would most concern the nurse before administration?

   • ASodium 138 mEq/L
   • BPotassium 2.9 mEq/LCorrect
   • CBUN 18 mg/dL
   • DGlucose 110 mg/dL
   Why this answer?

   Furosemide is a loop diuretic that causes potassium loss. A potassium of 2.9 (below normal range 3.5–5.0) signals hypokalemia. Administering further loop diuretic without electrolyte replacement risks dysrhythmia and digitalis toxicity if the patient is on digoxin.

2. 2

   Which client teaching is most important for a patient newly prescribed warfarin?

   • ATake the medication with grapefruit juice
   • BAvoid foods high in vitamin K
   • CIncrease consumption of leafy green vegetables
   • DAvoid all forms of NSAIDsCorrect
   Why this answer?

   Vitamin K should be kept consistent — not avoided — because warfarin's anticoagulant effect is dose-titrated against habitual vitamin K intake. NSAIDs, however, dramatically increase bleeding risk and must be strictly avoided.