Pharmacology Flashcards
This is a fluid and interactive process, composed of two elements:
pharmacodynamics and pharmacokinetics.
Pharmacodynamics can be viewed as
the drug’s effect on the body
Pharmacokinetics can be considered
the body’s effect on the drug
Four principles of pharmacokinetics
absorption
distribution
biotransformation
and excretion
Five primary medication effects
Pharmacological effect Side effects Idiosyncratic effects Allergic reactions Discontinuance syndrome
Agonist
Drug or chemical that acts on a receptor to mimic the effects of a naturally occurring substance (such as a hormone or neurotransmitter), or of another chemical; for example, beta adrenergic agonist medications mimic epinephrine and produce relaxation of bronchial (lung) muscles to treat asthma.
Antagonist
Substance or drug capable of blocking (at the receptor) the activity of an agonist without exerting any effect itself. For example, antipsychotics are dopamine receptor antagonists.
Differential diagnosis
The process of considering diagnostic possibilities
based on a comparison of signs and symptoms of two or more disorders or diseases.
Egodystonic
Symptoms subjectively experienced by the patient as being aversive, undesirable, or alien.
Egosyntonic
Signs or symptoms judged to be pathological by others but not experienced as distressing by the patient.
Toxicity
Serious medication-related adverse effects associated with actual or potential damage to tissues, organs, or the entire body system. Toxicity may be directly related to critically elevated blood levels of a drug and may be acute (as in a tranquilizer overdose) or chronic (as in prolonged, moderately elevated lithium level). A drug may also produce “toxic effects” at therapeutic doses
(such as phenothiazine’s potential for inducing bone marrow damage, which in turn causes decreased production of white blood cells).