Essentials for Medication Safety, 2nd Edition by
M. Linda Workman & LaCharity ISBN
9781455739769 Chapter 1-32 | Complete Guide A+
What is the therapeutic objective of drug therapy? - Answerto provide maximum benefit with minimum
harm
drug - Answerany chemical that can affect living processes
pharmacology - Answerthe study of drugs and their interactions with living systems
clinical pharmacology - Answerthe study of drugs in humans
Properties of an Ideal Drug - Answer- effectiveness: most important property, elicits the response for
which it was given
- safety: ability to not produce harmful effects, even at high doses and over long periods
- selectivity: elicits only the response for which it was given
additional properties of an ideal drug - Answerreversible action
predictability
ease of administration
, freedom from drug interactions
low cost
chemical stability
simple generic name
pharmacokinetics - Answerstudy of drug movement throughout the body (impact of the body on drugs)
4 major pharmacokinetic processes - Answerdrug absorption, drug distribution, drug metabolism, drug
excretion
absorption - Answermovement of drug from the administration site to the systemic circulation (blood)
enteral (GI) - Answerthrough stomach mucosa or small intestine (oral, TF, sublingual, buccal, rectal)
oral (PO) - Answerbarriers to absorption: epithelial lining of GI tract, capillary wall
absorption pattern: slow & variable
advantages: easy, convenient, inexpensive, ideal for self-med, potentially reversible
disadvantages: variability, inactivation of some drugs by gastric acid & digestive enzymes, possible
nausea & vomiting from local irritation, patient must be conscious & cooperative
pharmaceutical preparations for oral administration - Answertablets, enteric-coated preparations, and
sustained- release preparations
parenteral - Answerany other route than GI tract (IV, IM, SC, intra-dermal, intra-arterial, intra-hecal)
intravenous (IV) - Answerbarriers to absorption: none
absorption pattern: instantaneous
advantages: rapid onset, more ideal for emergencies, precise control over drug levels, use of large fluid
volumes, permits use of irritant drugs