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a. L-T4 is being withdrawn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c. both when L-T4 is being withdrawn and recombinant TSH is not an option.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
Thyroid suppression with levothyroxine is the first line treatment fo thyroid nodules in euthyroid patients. T or F
False
For treatment of a benign thyroid nodule, which statement is false?
a. Thyroid suppression therapy is routinely used for nodules.
b. Levothyroxine can preven further growth.
c. Goal is to keep TSH < 1 mU/L
a. Thyroid suppression therapy is routinely used for nodules.
Which of the following is the INCORRECT response regarding the treatment of hypothyroidism?
a) The dosage of levothyroxine must be reduced during pregnancy
b) Levothyroxine dosage adjustments are made every 4 to 6 weeks
c) Levothyroxine dosage adjustments are made every 4 weeks in the elderly
d) The average adult replacement dose of levothyroxine is 1.6mcg/kg/day
e) Levothyroxine treatment may exacerbate angina
A. Thyroid binding globulins increase during pregnancy and levothyroxine requirements may increase by up to 50%. It takes about 6 weeks to reach steady state after a dosage adjustment, so no dose adjustments should be made before 6 weeks.
Which of the following drugs does NOT reduce the absorption of levothyroxine?
a) Iron
b) Calcium c) Warfarin d) Sucralfate
C. Levothyroxine may affect the body’s response to warfarin, leading to increased anticoagulation. All of the other drugs bind to levothyroxine preventing its absorption, and the administration of these agents should be spaced to prevent this.
JP is 43-year old female with type 2 diabetes who is taking metformin 500mg twice daily, hydrochlorothiazide 25mg daily and citalopram 20mg daily. She has been trying to lose weight to help with both her diabetes and mild hypertension but has not been able to lose more than a few pounds. The best prescription alternative for her would be:
a) Bupropion SR 450mg daily
b) Orlistat 120mg three times daily
c) Liragludite 0.6mg sc daily
d) Bupropion SR 150mg daily
B. Orlistat is approved for weight loss in type 2 diabetes patients for whom it improves glycemic and metabolic control. Liraglutide, at a dose higher than that currently recommended for T2DM, may promote and maintain weight loss. Bupropion has mild appetite suppressant effects but is only to be used in the short term with a max dose of 150mg bid
Which of the following statements about medications used to treat obesity is TRUE?
a) Orlistat does not interfere with the absorption of soluble vitamins
b) Anti-obesity drugs have shown a beneficial effect on mortality
c) Discontinuation of anti-obesity medications typically does NOT result in regaining weight
d) In obese individuals, total daily doses of bupropion should not exceed 300mg to minimize seizure
risk.
D. Patients taking orlistat, should be advised to take a daily multivitamin >2 hours before or after orlistat. Anti-obesity medications have not been shown to have a beneficial effect on mortality. Discontinuation of anti-obesity medications typically does result in regaining weight. Single doses of bupropion of >150 mg per dose or total daily dose >300 mg/day are associated with increased seizure risk.
Red Flags by condition and drug induced conditions: Diabetes
DRUG INDUCED Diabetes (Dysglycemia)
● Atypical (2nd gener) antipsychotic agents, e.g., clozapine, olanzapine, quetiapine, paliperidone, risperidone.
● Beta-adrenergic antagonists, e.g. atenolol, metoprolol.
● Diazoxide
● Corticosteroids (ie. Prednisone) , Glucocorticoids
● Interferon alpha
● Isoniazid
● Niacin
● Pentamidine
● Protease inhibitors (amprenacir, atazanavir, darunavir, foasamprenavir, indinavir, lopinavir, nelfinavir, ritonavir, saquinavir, tipranavir)
● Tacrolimus
● ThiazIde, loop diuretics (furosemide, Hydrochlorothiazide HCTZ)
Red Flags by condition and drug induced conditions: Diabetes
METFORMIN INTX WITH CIMETIDINE
- RENAL FAILURE RISK
Red Flags by condition and drug induced conditions: Diabetes
Diabetic drugs CI in heart failure
Thiazolidinediones (ex.Pioglitazone) and DDP-4 (ex.Sitagliptan
Red Flags by condition and drug induced conditions: Hypo/Hyperthryroid
Drug induced Hyperthyroid
Corticosteroids, and some centrally acting drugs (such as domperidone, metocloproamide, dopamine
Thyroid storm: Excess radioactive iodine or removal from anti-thyroid drugs
Red Flags by condition and drug induced conditions: Hypo/Hyperthryroid
Drug induced Hypothyroid
Amiodarone, iodinated contrast agents, lithium, sulfonylureas
Red Flags by condition and drug induced conditions: Obesity
Drugs that cause Obesity
Corticosteroids, anti-hyperglycemic agents, anti-epileptic drugs, anti-psychotics
What is the most common cause of death in patients with diabetes?
a. Stroke
b. Kidney failure
c. Heart disease
d. None of the above
C
Which is not a goal therapy for the treatment of diabetes mellitus?
a. Control symptoms
b. Establish and maintain glycemic control while avoiding hypoglycemia
c. Reduce adiposity surrounding internal organs
d. Prevent or minimize the risk of complications
e. Achieve optimal control of associated risk factors such as hypertension, obesity and dyslipidemia
C
What family of drugs do not cause dysglycemia?
a. Beta-blockers
b. Corticosteroids
c. Immunosuppressive agents
d. Protease inhibitors
e. Thiazide diuretics
f. Oral hormonal birth control
F
For patients newly diagnosed with T2DM, with HbA1C >8.5%, lifestyle modification is appropriate as the first step. T or F
F (T if HbA1C <8.5%)
Which of the following are risk factors for T2DM?
a. First degree relative with T2DM.
b. History of gestational diabetes
c. HDL cholesterol <1mmol/L (in males) or <1.3 (in females)
d. HIV infection
e. PCOS
f. a + b
g. a + c
h. all of the above
H
Self-monitoring of blood glucose is more important for patients taking oral anti hyperglycemic agents than in patients treated with insulin. T or F
False
Insulin may be administered
a. Orally
b. By syringe
c. By pen
d. By insulin pump
e. All of the above
f. b + c + d
F
Human insulins are produced by recombinant DNA technology and have an amino acid sequence identical to endogenous human insulin. T or F
True
Long-acting insulin analogues (insulin detemir and insulin glargine) allow for more flexibility to control postprandial glucose. T or F
F
Rapid-acting insulin analogues (insulin aspart, insulin glulisine, insulin lispro allow for more flexibility.
Which statement about long-acting insulin analogues (detemir and glargine) is untrue?
a. May be associated with fewer episodes of nocturnal hypoglycemia
b. Are more expensive than traditional insulin
c. Produce more predictable effects than intermediate acting insulin.
d. Have accumulated significant long-term safety and efficacy data.
D