Key Concepts
Overview
Antibiotics are among the most commonly prescribed medications in healthcare. Nursing responsibilities include: correct administration, allergy verification, monitoring for adverse effects, obtaining cultures before administration, and supporting antibiotic stewardship to prevent resistance. Antibiotic stewardship is the systematic effort to ensure antibiotics are used only when truly indicated, at the right dose, route, and duration — to optimize patient outcomes and minimize resistance development and adverse effects. Mechanism overview: - Cell wall synthesis inhibitors: penicillins, cephalosporins, carbapenems, vancomycin - Protein synthesis inhibitors: aminoglycosides (30S ribosome), tetracyclines (30S), macrolides (50S), clindamycin (50S), linezolid (50S) - DNA/RNA synthesis inhibitors: fluoroquinolones (DNA gyrase), rifampin (RNA polymerase), metronidazole (DNA strand breakage) - Cell membrane disruptors: polymyxins (polymyxin B, colistin) - Antimetabolites: trimethoprim-sulfamethoxazole (folate synthesis) On the exam, writers often pair stable-sounding options with unstable data—notice the mismatch before you commit. If the stem names a license or role, reread that line; scope errors are classic trap answers even when the clinical topic is familiar. Run a 60-second scan: breathing work and oxygenation, perfusion and end organs, neuro baseline, likely infection sources, and devices that can...