Route of Administration: Advantages: - Most convenient - Usually less expensive - Safe, does not break skin barrier Disadvantages: - Inappropriate for client with nausea and vomiting - Drugs may have unpleasant taste or odor -Inappropriate if client cannot swallow or is unconsciour - Cannot be used before certain diagnostic test or surgical procedures - Drug may discolor teeth, harm tooth enamel - Drug may irritate gastric mucosa - Drug can be aspirated by serious ill clients