Endocrine disorders Flashcards
Drugs that cause hypothyroidism: ITALC
interferon
TKi’s
Amiodarone
Lithium
Carbamazepine
T4
-thyroxine
-short half-life
T3
-triiodothyronine
-potent
hypothyroidism
deficiency in T4 and incr TSH
-commonly caused by Hashimoto’s
-Sx/S: cold intolerance, dry skin, fatigue, muscle cramps, voice changes, constipation, weight gain, goiter, myalgias, weakness, depression, bradycardia, coarse hair/loss of hair, menorrhagia, memory and mental impairment
hypothyroidism treatment
-levothyroxine (T4 -Synthroid, Levoxyl, Unithrold) > full replacement dose is 1.6 mcg/kg/day; different dose for those with known CAD
-Thyroid, dessicated USP (T3, T4 -Armour Thyroid)
-Liothyronine (T3) (Cytomel)
-levothyroxine > take with water, at least 60 min before breakfast or at bedtime (3 hours after last meal)
-levothyroxine IV: 0.75:1
Orangutans Will Vomit On You Right Before They Become Large Proud Giants
25 mcg = orange
50 mcg = white
75 mcg = violet
88 mcg = olive
100 mcg = yellow
112 mcg = rose
125 mcg = brown
137 mcg = turquoise
150 mcg = blue
175 mcg = lilac
200 mcg = pink
300 mcg = green
drugs that decrease the effect of thyroid replacement: decrease levothyroxine absorption
-antacids and polyvalent cations that contain iron, Ca, Al, or magnesium multivitamins
-cholestyramine, sevelamer, sucraflate
hyperthyroidism
-FT4 is high and TSH is low
-Sx/S: heat intolerance or increased sweating, weight loss, agitation, nervousness, irritability, anxiety, palpitations, tachycardia, fatigue, and muscle weakness, diarrhea, insomnia, tremor, thinning hair, goiter, light or absent periods
-common causes: graves disease, iodine, amiodarone, and interferons
hyperthyroidism treatment
-BB for symptom control
-surgery
-Propylthiouracil (PTU) or methimazole
PTU and Methimazole
-takes 1-3 months for symptom control once symptoms are controlled reduce dose to prevent hypothyroidism
-PTU box warning: severe liver injury and acute liver injury, preferred in 1st trimester
-methimazole is the DOC
-PTU is preferred in thyroid storm
-methimazole can be used in 2nd and 3rd trimester
S/Sx of thyroid storm
fever, tachycardia, tachypnea, dehydration, profuse sweating, agitation, delirium, psychosis, coma
tx of thyroid storm
PTU + inorganic iodide therapy + BB + systemic steroid
cortisol
replaced by giving any of the steroids
aldosterone
replaced by giving fludrocortisone - has mineralcorticoid activity and is used for addisons disease and orthostatic hypotension
glucocorticoids
cause adrenal glands to stop producing cortisol due to suppression of HPA
cushings syndrome
-making too much cortisol or high dose steroids that are higher than the normal amount of endogenous cortisol
-moonface, buffalo hump, acne, pink/purple stretch marks, poor wound healing, poor bone health, diabetes, muscle wasting
Steroids least potent to most potent: Cute Hot Pharmacists and Physicians Marry Together and Deliver Babies
cortisone > hydrocortisone > prednisone > prednisolone > methyprednisolone > triamcinolone > dexamethasone > betamethasone