Drug Administration RoutesInjections, IntravenousAdministration, OralInjections, SubcutaneousInjections, IntraperitonealInjections, IntramuscularAdministration, CutaneousDose-Response Relationship, DrugDrug Administration ScheduleUnited States Food and Drug AdministrationAdministration, IntranasalTime FactorsRats, Sprague-DawleyRats, Wistar