Pharmacology Principles

Advanced pharmacology for nurse practitioners integrates pharmacokinetics, pharmacodynamics, pharmacogenomics, and clinical pharmacology into evidence-based prescribing decisions. The NP must understand drug-receptor interactions (agonism, antagonism, partial agonism, inverse agonism), dose-response relationships (graded and quantal), therapeutic index calculations, and the clinical significance of CYP450 polymorphisms. Prescribing requires consideration of the complete clinical context: patient-specific factors (age, weight, organ function, pregnancy status, genetic profile), drug-specific factors (mechanism, kinetics, interactions, adverse effect profile), and system-level factors (formulary availability, cost, adherence barriers, monitoring requirements). The NP applies the principles of rational prescribing: right drug, right dose, right route, right patient, right monitoring.