Pharmacology and Medication Safety
Core concepts
Focus on the rights of medication administration, high-alert medications, common drug classes and their key adverse effects, and the reporting of medication errors. Know the rights (right patient, drug, dose, route, time, documentation, and reason) and why each exists. Understand how drugs are absorbed, distributed, metabolized, and excreted, and how that affects timing and dosing. Recognize high-alert categories (anticoagulants, insulin, opioids, concentrated electrolytes) and the double-check practices around them. Know the difference between an adverse effect, an allergic reaction, and a medication error.
Traps
Questions test whether you can distinguish a side effect from an error, and whether you know to report errors even when no harm occurred. Distractors may suggest adjusting a dose independently or skipping a check when the patient is familiar. Watch for look-alike/sound-alike drug names and unit traps (mg vs. mcg, units vs. mL). Never accept an answer that has you administer a drug when the order is unclear - clarify first.
Rule of thumb
Three-checks rule: verify the medication against the order at three points - when retrieving, when preparing, and at the bedside before administration. If any check fails, stop and clarify.
Worked example
An order reads "insulin 10 units" but the label says "100 units/mL." Because insulin is high-alert, you double-check the dose and concentration with a second qualified person before administering. If the order is ambiguous, you clarify with the prescriber rather than estimating.