Cardiovascular AgentsOxyfedrinePharmacoepidemiologyCardiovascular DiseasesDrug PrescriptionsDrug UtilizationAdrenergic beta-AntagonistsCalcium Channel BlockersHypolipidemic AgentsDrug InteractionsAntihypertensive AgentsAngiotensin-Converting Enzyme InhibitorsHydroxymethylglutaryl-CoA Reductase InhibitorsRisk FactorsCohort Studies