Chapter 3 Flashcards
role of nurse regarding drug toxicity (3)
Recognize adverse effects
Patient and family teaching
Responding to adverse effects - some can be countered with specific precautions, comfort measures
2 types of side effects
Primary action - extension of desired effect - too much
Secondary action - effects in addition to desired effect
define hypersensitivity
Excessive response to a drug
hypersensitivity usually r/t
underlying condition
define drug allergies
Occur when body forms antibodies to drug causing an immune response to it
define cross-sensitivity + example
some drugs are similar enough to produce a reaction to both
cephalosporin and penicillin
if a patient says they have a drug allergy, ask them…
what their response to drug is
4 types of allergy
anaphylaxis
cytotoxic
serum sickness
delayed reaction
explain anaphylaxis
Antibodies release histamines that cause mucous membrane swelling, constriction of airways
s/s anaphylaxis
Hives, rash may be present at beginning
Increased BP, HR, panic, respiratory arrest
admin _____ for anaphylaxis
epinephrine
explain cytotoxic allergy
Antibodies attack antigens on cell sites, causing cell death
s/s cytotoxic allergy
CBC (complete blood count) shows damage to blood cells, elevated liver enzymes, decreased renal function
treatment for cytotoxic is ____
supportive; relief of symptoms
explain serum sickness
Antibodies cause damage to tissues
when may serum sickness occur
a week or more after exposure
s/s serum sickness
Itchy rash, high fever, swollen lymph nodes, painful joints, edema of face and limbs
admin ______ for serum sickness
antiinflammatory drugs - steriods
explain delayed reaction allergy
Antibodies are bound to specific WBCs
s/s delayed reaction
Rash, hives, swollen joints