Neuropharm Flashcards
(24 cards)
Release regulated in response to changes in plasma osmolarity, extracellular volume, or sensory nerve input
Posterior pituitary hormones
Negative feedback to hypothalamus or pituitary from pituitary hormone or target tissue hormone
Anterior pituitary hormones
Hypothalamic dwarfism treated by
GH replacement
Exact match with human GH. Given subcutaneously 1x/day in evening
Somatropin
Synthetic GHRH
Sermorelin
Early in treatment have increased ICP and may be diabetogenic due to anti-insulin actions that cause decreased glucose usage
GH therapy
Used to treat GH deficiency. Used in Laron dwarfism which has mutation in GH receptor. Also useful for patients with antibodies to GH. Can cause hypoglycemia and lipohypertrophy
Human recombinant IGF-1
Octreotide and lanreotide
Somatostatin analogues
Longer half lives than somatostatin. Inhibit GH secretion and reduce levels of IGF-1. Given subcutaneously
Octreotide and lanreotide (somatostatin analogs). Lanreotide is longer acting
Cause GI side effects and gallstones
Somatostatin analogues (octreotide and lanreotide)
Competitive GH receptor antagonist that reduces IGF-1. Indicated for acromegaly (2nd line therapy). Monitor liver fun. Can cause lipohypertrophy at injection site
Pegvisomant
Amenorrhea, galactorrhea, infertility in women.
Impotence, galactorrhea, and infertility in men
Prolactinemia
Bromocriptine and cabergoline
Dopamine receptor agonists
Stimulate dopamine D2 receptors to inhibit spontaneous and TRH-induced release of PRL
Cabergoline and bromocriptine (dopamine receptor agonists)
Longer half life and greater selectivity for D2 receptor. More potent.
Carbergoline
Lower tendency to induce nausea, causes hypotension and dizziness. But linked to valvular disease that could be attributed to its ergot activity (mediated via serotonin receptor)
Cabergoline dopamine receptor agonist
Synthetic TRH that stimulates release of TSH. Used for diagnostic purposes in hypothyroidism
Protirelin
After Protirelin given > T3, T4, and TSH normal
Hypothalamic prob
After Protirelin given > TSH, T4, and T3 not increased
Pituitary failure
After Protirelin given > TSH increased, T3/T4 not increased
Thyroid gland problem
Cosyntropin is an _______ synthetic analog
ACTH
Used diagnostically to determine primary vs secondary adrenal insufficiency
Cosyntropin (ACTH analog)
_________ GnRH analogs downregulate GnRH receptors and are used to block release of FSH and LH
Long acting
CRH release
ACTH