exam #1: thyroid

Lab Values: Hypothyroidism

-Decreased T3 and T4

-Increased TSH

Lab Values: Hyperthyroidism

-Increased T3 and T4

-Decreased TSH

What happens to lab values if hypothyroidism treatment is working?

-T3 and T4 increase

-TSH decreases

What happens to lab values if hyperthyroidism treatment is working?

-T3 and T4 decrease

-TSH increases

How do Thyroid Hormone replacement drugs work?

Replace thyroid hormones to improve levels

What are Thyroid Hormone replacement drugs used for?

Hypothyroidism

What are the adverse effects of Thyroid Hormone replacement drugs?

Hyperthyroidism (if too much)

What should patients know about Thyroid Hormone replacement drugs?

-Take on an empty stomach

-Therapy is lifelong

Which drugs should be avoided while taking Thyroid Hormone replacement drugs?

-Iron

-Calcium

-Antacids

What is the category of Levothyroxine (Synthroid/Levothroid/Levoyxl)?

Thyroid Hormone Replacement

What is the category of Liothyronine (Cytomel)?

Thyroid Hormone Replacement

What is the difference between Levothyroxine and Liothyronine?

Levothyroxine = replaces T4

Liothyronine = replaces T3

How do Antithyroid drugs work?

Decrease thyroid hormone production

What are Antithyroid drugs used for?

Hyperthyroidism

What are the adverse effects of Antithyroid drugs?

-Agranulocytosis (rare)

-Hypothyroidism

What should patients know about Antithyroid drugs?

Report signs of infection (agranulocytosis)

What is the category of Propylthiouracil (PTU)?

Antithyroid

What is the category of Methimazole (Tapazole)?

Antithyroid

Which drug is preferred for Hyperthyroidism during pregnancy?

Propylthiouracil

What is the category of Propranolol?

Beta-Blocker

How does Propranolol help with hyperthyroidism?

Reduces HR caused by hyperthyroidism

Does Propranolol impact thyroid hormones (T3, T4, or TSH)

-No

-Only affects HR