Pharmacology and Medication Administration
Core concepts
Master the rights of medication administration (right patient, drug, dose, route, time, documentation, reason, and the patient's right to refuse), the major drug classes and their mechanisms, and high-alert medications requiring independent double-checks (insulin, heparin, opioids, chemotherapy, concentrated electrolytes). Pharmacokinetics - absorption, distribution, metabolism, excretion - explains onset, peak, and duration, and therefore monitoring timing. Know therapeutic ranges, common adverse effects, and antidotes. Calculation competence is assumed: dose desired over dose on hand, weight-based dosing, and infusion rates. The nursing process applies to medication: assess before giving, monitor after, and teach the patient.
Traps
Classic distractors include giving a drug when a parameter is outside the ordered range (hold and notify), crushing extended-release formulations, and confusing similar names or units (mg versus mcg, units versus mL). Another trap is treating an allergy as an intolerance - clarify before administering. Do not administer a drug prepared by someone else without verification. Also, "the order was written" does not override your obligation to question an unsafe dose.
Rule of thumb
Check the parameter before you check the box. If a hold parameter is met, withhold the dose, assess the patient, notify the prescriber, and document.
Worked example
Digoxin is ordered. The apical pulse is 52 beats per minute and the order states to hold for a rate below 60. The correct action is to withhold the dose, reassess, notify the prescriber, and document the finding and communication - not to give half the dose or wait for the next shift.