Thyroid Drugs Part 3.docx

**Slide 13: Levothyroxine Dosage and Dosing Considerations** 1. **What is the recommended starting dose of levothyroxine for a patient over 50 years old with no known cardiac disease?** - A. 100 mcg/day - B. 25 mcg/day - C. 50 mcg/day - D. 75 mcg/day\ **Answ...

**Slide 13: Levothyroxine Dosage and Dosing Considerations** 1. **What is the recommended starting dose of levothyroxine for a patient over 50 years old with no known cardiac disease?** - A. 100 mcg/day - B. 25 mcg/day - C. 50 mcg/day - D. 75 mcg/day\ **Answer:** C. 50 mcg/day is a more conservative levothyroxine dosing approach recommended for older patients with cardiac disease?\*\* - A. To prevent osteoporosis - B. To reduce the risk of atrial fibrillation, angina, or myocardial infarction - C. To increase the half-life of the drug - D. To prevent drug interactions\ **Answer:** B. To reduce the risk of atrial fibrillation, angina, or myocardial infarction 2. **Hor initiating levothyroxine therapy should a full thyroid panel be rechecked?** - A. 2-4 weeks - B. 4-6 weeks - C. 6-8 weeks - D. 10-12 weeks\ **Answer:** C. 6-8 weeks **Slide roxine Tablet Strengths and Adverse Effects** 1. **Which of the following adverse effects is most likely due to excessive levothyroxine dosing?** - A. Hair loss - B. Diarrhea and weight loss - C. Hypertension - D. Hypoglycemia\ **Answer:** B. Diarrhea and weight loss 2. **Which of the followingnormalities can result from over-replacement with levothyroxine?** - A. Bradycardia - B. Arrhythmias and myocardial infarction - C. Coronary artery disease - D. Deep vein thrombosis\ **Answer:** B. Arrhythmias and myocardial infarction 3. **Which supplements should be sepalevothyroxine administration by at least 4 hours to avoid decreased absorption?** - A. Calcium and iron supplements - B. Folic acid and vitamin B12 - C. Vitamin D and potassium - D. Magnesium and zinc\ **Answer:** A. Calcium and iron supplements **\*\*Slide 15: Levothyroxine Drug Interac Which medications can increase the metabolism of levothyroxine, necessitating a higher dose?** - A. Proton pump inhibitors - B. Cytochrome P450 inducers such as phenytoin and carbamazepine - C. Antacids - D. Calcium supplements\ **Answer:** B. Cytochrome P450 inducers such as phenytoin and carbamazepine 2. **How long should a patient wait to take calcium or irnts after taking levothyroxine?** - A. 2 hours - B. 3 hours - C. 4 hours - D. 5 hours\ **Answer:** C. 4 hours 3. **Which of the following drugs can decrease levothyroxine absorpen concurrently?** - A. Multivitamins containing zinc - B. Corticosteroids - C. ACE inhibitors - D. Beta-blockers\ **Answer:** A. Multivitamins containing zinc