Midterm Exam Flashcards
(39 cards)
Chloramphenicol caused
gray baby syndrome
thalidomide caused
phocomelia
sulfonamides caused
kernicterus
Geriatric PK considerations
Decreased muscle mass and increased total body fat increasing distribution of lipophilic drugs
Fried’s rule infant < 2
month/150 x adult dose
Modified weight rule infant > 2
wt(kg)/50 kg x adult dose
Young’s rule infant > 2
[age/(age +12)] x adult dose
Body weight dosing
Most commonly used calculation
Body surface area dosing
Most accurate calculation
Neonatal gastric emptying
peristalsis may be absent up to 1st four days of life
Neonatal gastric emptying rate factors
Decreased: CHD, GERD, high caloric feeds, RDS
Increased: Human milk
Infant gastric pH
Neutral at birth
Acidic (pH 1-3) in 24 h
Neutral (pH 6-8) in 1 wk
Acidic through childhood
Why is IM not preferred for infants?
Less muscle mass, erratic peripheral perfusion, decreased muscular contraction
What vitamin is given IM at birth?
Vitamin K
Why is topical route not preferred for infants?
Increased skin absorption because of undeveloped epidermal layer
Premature infant total body h20
85%
Full-term infant total body h20
75%
Albumin level for infants
Low. Chance of displaced bilirubin from highly protein-bound drugs
Displaced bilirubin can cause
jaundice and kernicterus
Benzyl alcohol (preservative) effect in infants
Hippuric acid - “benzyl alc gasping syndrome”, severe metabolic acidosis and multiple organ failure
Modified/Bedside Schwartz
CrCl = 0.413 x Ht (cm)/Scr
Pedi oral abs gastric pH
Increased
Pedic gastric emptying time
Increased
Pedi intestinal CYP3A4
Decreased