Endocrine and Metabolic Disorders Flashcards
What’s the minimum HbA1c target to prescribe lowering blood glucose medication?
<7.5
What medication can be prescribed for a HbA1c target of <7.5?
Metmorfin
When should treatment be considered if subclinical hypothyroidism is confirmed?
a. TSH > 10 mU/L
B. abnormal lipid profile
c. sxs of hypothyroidism
d. anti-TPO (+)
e. all of the above
e. all of the above
Levothyroxine alone is the treatment of choice for hypothyroidism? T or F
True
The average daily dose of levothyroixine for a 55 kg women with confirmed hypothyroidism would be:
a. 0.088 mg
b. 0.125 mg
c. 0.2 mg
a. 0.088 mg
Adult dose average 1.6 ug/kg/day
Average newborn dose 10-16 ug/kg/day
How often are dosage adjustments made to levothyroxine?
Every 4-6 weeks as needed.
How long does it take to attain a steady state after adjustment of levothyroxine?
6 weeks
A start dose as low as 12.5 ug/day should be used in which patient population?
a. infants
b. patients with thyroid cancer
c. elderly
d. patients with coronary artery dz.
e. a+b
f. c+d
f. elderly and patients with coronary artery disease
High doses of levothyroxine may be associated with an increased risk of fracture in elderly patients. T or F
True
T3 can be used as a long term substitute for levothyroxine. T or F
False
T3 is used for short-term management of patients with thyroid cancer when:
a. L-T4 is being withdrawn
b. recombinant TSH is not an option
c. both a+b
c. both when L-T4 is being withdrawn and recombinant TSH is not an option.
Desiccated thyroid provides reliable dosing and presents a clear therapeutic advantage. T or F
False
A low TSH level in the first-trimester of pregnancy should be investigated as hyperthyroidism. T or F
False
If a patient’s TSH is not suppressed in the first-trimester this may indicate:
a. new dx of hypothyroidism
b. under-treatment with levothyroxine
c. a+b
c. a new dx of hypothyroidism and under-treatment with levothyroxine
Women who are known to be hypothyroid and are medicated should be advised to increase their thyroid hormone dose by ___ tablets per week immediate following a (+) pregnancy test.
a. 2
b. 4
c. 6
a. 2
Requirements for L-T4 replacement may increase by up to ___% in pregnancy to maintain TSH between 2-5 mU/L.
a. 25
b. 50
c. 75
b. 50
TSH should be monitored every 6 weeks or 4 weeks post dosage adjustment during pregnancy. T or F
True
An ideal TSH level for 1st trimester is:
a. <1.5 mU/L
b. <2.5 mU/L
c. <3.5 mU/L
b. <2.5 mU/L
And ideal TSH level for 2nd and 3rd trimester is?
a. < 2 mU/L
b. < 3 mU/L
c. < 4 mU/L
b. < 3 mU/L
Iron supplements and levothyroxine should be separated by:
a. at least six hours due to decreased absorption of thyroid medication.
b. at least 2 hours due to decreased absorption of iron.
a. at least six hours due to decreased absorption of thyroid medication.
Thyroid hormone replacement is safe during pregnancy and breastfeeding. T or F
True
Myxedema coma can be safely treated in office? T or F
False
Suppression of TSH can be seen in:
a. nonthyroidal illness
b. depression
c. treatment with corticosteroids
d. treatment with some centrally acting medications (domperidone, metoclopramide, dopamine)
e. all of the above
e. all of the above
Medical therapy with antithyroid drugs is only indicated if surgery is not an option. T or F
False, initiate prior to surgery to attempt euthyroid state.
Radioactive iodine is safe in pregnancy. T or F
False
If using RAI in patients with significant opthalmopathy, what drug should be given concomitantly?
Corticosteroids
Both Methimazole and propylthiouracil block conversion of T4 –T3.
T or F
False. Both decrease production of thyroid hormones, only PTU blocks conversion.
Methimazole and proplythiouracil must be stopped ___ days prior to thyroid scan.
a. 2
b. 5
c. 7
b. 5 days
Side effects of mehimazole and propylthiouracil include:
a. allergy
b. rash
c. agranulocytosis
d. hepatoxicity and nephrotoxicity
e. b+d
f. all of the above
f. all of the above
Propylthiouracil has a lower incidence of side effects than Methimazole. T or F
False
Beta-blockers are used to:
a. ameliorate sxs of adrenergic excess
b. decrease conversion of T4-T3
c. a+b
c. ameliorate sxs of adrenergic excess and decrease conversion of T4-T3
To block thyroid hormone production, iodine/Lugols solution should be given
a. with antithyroid medication
b. 1 hour after administration of an antithyroid drug
c. 3 hours after administration of an antithyroid drug
b. 1 hour after administration of an antithyroid drug
During a thyroid storm, hyperthermia should be treated with
a. Ibuprofen
b. ASA
c. acetominophen
c. acetominophen
How long should a woman wait after radioactive iodine treatment to become pregnant?
a. > 6 months
b. > 12 months
c. > 2 years
a. > 6 months
With the exception of RAI, all hyperthyroid drugs are safe during pregnancy. T or F
False
Propylthyrouracil is preferable to methimazole during the 1st trimester due to increased risk of
a. spontaneous abortion
b. congenital abnormalities
c. preeclampsia
b. However, PTU has a higher risk of hepatoxicity so consider switching to methimazole in 2nd trimester.
During pregnancy women typically require higher doses of antithyroid medication. T or F.
False, as with A/I conditions Graves often goes into remission during pregnancy.
Overtreatment of hyperthyroidism may induce hypothyroidism for newborn. T or F
True
What blood work should be monitored for a patient medicated of hyperthyroidism?
a. TSH, fT3, fT4
b. CBC with differential
c. LR enzymes
d. all of the above
d. all of the above