adrenal and pituitary summary pdf Flashcards
(50 cards)
chronic glucocorticoid excess
cushings disease
caused by therapy with glucocorticoids
iatrogenic cushings
caused by overproduction of adrenococorticotropic hormone (ACTH) by pituitary gland adenomas
endogenous cushings
cushings presentation
obesity involving the face, neck, trunk, abdomen
HTN
hirsutism
acne
amenorrhea
depression
thin skin
easy brushing
DM
osteopenia
where is corticotropin releasing hormone produced
hypothalamus
what hormone stimulates the anterior pituitary gland to release ACTH (corticotropin)
corticotropin releasing hormone
what stimulates the adrenal cortex to produce cortisol
ACTH
diagnosing cushings is based on what
s/s of hypercortisolism
dexamethasone supression test
24hr urine cortisol measurement
treatment of minimization of corticosteroid exposure is for which type
iatrogenic
pharmacotherapy is aimed at what
reducing cortisol production or activity with drugs, radiation, or surgery
MOA- inhibit CYP450 dependent enzymes and cortisol synthesis
ketoconazole
MOA- cytotoxic drug that suppresses ACTH secretion and reduces synthesis of cortisol
mitotane
MOA- decreases cortisol synthesis by inhibition of 11-hydroxylase activity
metyrapone
ketoconazole counseling points
should be taken with food
separated from antacids by at least 2 hours
watch for abdominal pain, yellow skin and pale stool
ADE of ketoconazole
N/V
HA
impotence
hepatotoxicity
ADE of metyrapone
N/V
dizziness
sedation
ADE if mitotane
N/V/D
tiredness
mitotane box warning
adrenal crisis occurs is the setting of shock or severe trauma and response to shock is impaired. administer hydrocortisone, monitor for escalating signs of shock and discontinue mitotane until recovery
ketoconazole is CYP450 3A4 enzyme inhibitor, what drugs should be avoided
drugs that lower gastric acidity, these will decrease absorption of ketoconazole
what should be monitored with mitotane
cortisol
caused by auto immune mediated destruction of the adrenal cortex
Addisons disease (primary adrenal insufficiency)
addisons disease results in what deficiency
glucocorticoid and mineralocorticoid
occurs after cessation of chronic exogenous corticosteroid use
secondary adrenal insufficiency
endocrine emergency precipitated by severe stress
acute adrenal insufficiency (addisonian crisis)