title: A basic guide to the principles of drug therapy.
abstract: Why must glyceryl trinitrate tablets be given sublingually? Why can you crush some tablets but not others? Can drug therapy cause red urine? How can suppositories stop vomiting? This article discusses why certain drugs are given by specific routes of administration and examines issues related to drug therapy, giving examples of drugs used in practice. Clinical tutors may wish to use this and subsequent articles for teaching purposes.
authors.forename: A
authors.initials: A
authors.lastname: John
authors.forename: T
authors.initials: T
authors.lastname: Stevenson
mesh_terms: D004347:Drug Interactions; D004358:Drug Therapy / Q000379:methods* / Q000451:nursing; D006801:Humans; D007408:Intestinal Absorption; D008657:Metabolic Clearance Rate; D010599:Pharmacokinetics; D010600:Pharmacology