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16 Cards in this Set

  • Front
  • Back
pharmacology
the science basic to medicine that is about the effects of chemicals on living systems at all levels of organization (molecular to whole body)
- prevent, diagnose, treat
- modify (do not create) physio processes
pharmacodynamics
the study of the biochemical and physiological effects of drugs and their mechanisms of action
- the drug having effects on the body
pharmacokinetics
the absorption, distribution, biotransformation and excretion of drugs
- the body having actions on the drug
toxicology
an aspect of pharmacology that deals with the adverse effects of drugs and chemicals
Three general mechanisms of drugs
1. replacement therapy
2. chemical antagonist
3. nonspecific
replacement therapy
- treatment for a deficiency in some essential component of a normally functioning body -- iron, vitamins, neurotransmitter, or a hormone
examples: insulin deficiency in Diabetes Mellitus
selective serotonin reuptake inhibitors (SSRIs) decrease degradation of serotonin
pharmacotherapeutics
the use of drugs in the prevention and treatment of disease
- provide relief of symptoms
- alter favorably the course of the disease
chemical antagonist
treatment for the excess action of some normal or essential ingredient of an organism --> causes difficulties
examples: antacids to counteract heartburn produced by gastric acidity
- specific (receptors) antagonists to counteract an exogenous substance
example: opioid antagonist (naloxone) during heroin overdose
nonspecific drugs
drugs which act simply because of their presence
- specific part of body is altered
examples: laxatives and antacids act on the GI tract
drug affinity for receptor
- appropriate size, shape, charge, and atomic composition
KADME
Kinetics
Absorption
Distribution
Metabolism
Excretion
components of drug disposition
absorption, distribution, metabolism, and elimination/excretion
disposition rates influence....
tissue drug concentration

(elimination/excretion rate = greatest influence)
therapeutic window
a relative measure of dose that a drug can achieve a therapeutic effect without producing a side effect
therapeutic window equation
ratio of TD50 (toxic dose) to the ED50 (effective dose) for the desired effect
desirable therapeutic window
large
- 100 or more