Exam 1 Flashcards
Hyperprolactinemia hormone changes and organ
Increase prolactin
Organ- pituitary gland
Acromegaly hormone changes and organ
Hormone changes- increase growth hormone
Organ- pituitary gland
Cushing’s disease hormone changes and organ
Hormone changes- increase glucocorticoids (cortisol)
Organ- adrenal gland
Growth hormone deficiency hormone changes and organ
Hormone changes- decrease growth hormone
Organ- pituitary gland
Addison’s disease hormone changes and organ
Hormone changes- decrease glucocorticoids (cortisol), decrease mineralocorticoids (aldosterone)
Organ- addison’s disease
Hyperaldosteronism hormone changes and organ
Hormone changes- increase mineralocorticoids (aldosterone)
Organ- adrenal gland
What is prolactin regulated by?
Regulated by inhibitory effects of dopamine
Prolactin secretion
Secreted in a pulsatile fashion
Prolactin promotes what?
Lactation, breast development, and reproductive function
Hyperprolactinemia
Persistent prolactin concentrations >25 mcg/L
Most commonly affects women ages 24-35 with about 24 cases per 1,000 person years
Etiology of hyperprolactinemia
Pituitary tumors Drug-induced (dopamine antagonists) CNS lesions Hypothyroidism Idiopathic
Drug induced hyperprolactinemia
Dopamine antagonists- antipsychotics, metoclopramide
Prolactin stimulators- estrogens, progestins, SSRIs, 5HT1 receptor agonists, Benzos, MAO inhibitors, TCAs, opioids, H2 receptors antagonists
Other- verapamil
Hyperprolactinemia clinical presentation female
menstrual cycle changes: oligomenorrhea or amenorrhea Galactorrhea Infertility Decreased libido Hirsutism Acne
Hyperprolactinemia clinical presentation male
Decreased libido Erectile dysfunction Infertility Reduced muscle mass Galactorrhea Gynecomastia
Clinical sequelae of hyperprolactinemia
Osteoporosis, ischemic heart disease
Hyperprolactinemia medications
Cabergoline
Bromocriptine
Cabergoline
MOA: long acting D2 receptor agonist
First line- shown to be more effective than bromocriptine
0.25-0.5 mg WEEKLY or twice weekly
Increase at 4 week intervals based on prolactin levels
AE of cabergoline
GI: Nausea, vomiting, constipation
CNS: headache, dizziness, anxiety, depression
Nasal decongestion
Dose adjust for hepatic failure
Bromocriptine
MOA: D2 receptor agonist
1.25-2.5mg QD at bedtime
Increase weekly based on prolactin levels
Bromocriptine AE
CNS: headache, lightheadedness, dizziness, nervousness, fatigue
GI: nausea, abdominal pain, diarrhea (administer WF)
Pregnancy with hyperprolactinemia treatment
Recommend discontinuing cabergoline or bromocriptine
Hyperprolactinemia monitoring and follow-up
Prolactin levels every 3-4 weeks until stable then every 6-12 months
Assess symptoms
After 2 years of treatment may be tapered or discontinued in the absence of visible tumor
Growth hormone
GH has direct anti-insulin effects
Growth-promoting effects mediated by insulin-like growth factors (ICF’s), which directly stimulate cell proliferation and growth
Growth hormone secretion
Secreted by anterior pituitary in pulsatile fashion