Week 3 Pharm Flashcards
What do Glucocorticoids like Prednisone, Prednisolone, Hydrocortisone, and Dexamethasone do?
Replaces endogenous cortisol, causes inhibition of phospholipaseA2; ↓ Cyclooxygenase (prostaglandins, leukotriene), Cytokines (Tumor necrosis factor, IL-3,4,5,13, Granulocyte-Macrophage Stimulating factor)
What are side effects of Glucocorticoids like Prednisone, Prednisolone, Hydrocortisone, and Dexamethasone?
Acute: mood changes, hypokalemia, GI upset/ulcer, hyperglycemia. Chronic: HPA-axis suppression, muscle wasting, cushingnoid, gluconeogenesis, salt&water retention, GI ulcer, osteoporosis, psychosis, immunosuppression, thin skin, cataract, glaucoma.
What do Mineralocorticoids like Fludrocortisone do?
Very potent affinity for mineralocorticoid receptor (↑ Na+/K+ATPase & ENaC expression) leads ↑ Na+ reabsorption and K+ excretion in distal tubules
What are the side effects of Mineralocorticoids like Fludrocortisone?
Hypertension, edema, headache, hypokalemia, weight gain.
Which hypercortisolism drug inhibits cytochrome P450-dependent enzymes~cortisol synthesis?
Ketoconazole
What does Fludrocortisone treat?
Adrenal insufficiency, hypopituitarism
What does Ketoconazole treat?
Cushing’s syndrome
What are the side effects of Ketoconazole?
Nausea, vomiting, headache, impotence and hepatotoxicity
Which hypercortioslim drug is a cytotoxic drug that suppresses ACTH secretion and reduces synthesis of cortisol?
Mitotane
What does Mitotane treat?
Inoperable adrenocortical carcinoma; Cushing’s syndrome
What are the side effects of Mitotane?
Nausea, vomiting, diarrhea and tiredness
Which hypercortisolism drug decreases cortisol synthesis by inhibition of 11-hydroxylase activity?
Metyrapone
What does Metyrapone treat?
Cushing’s syndrome
What are the side effects of Metyrapone?
Nausea, vomiting, dizziness and sedation
What does the hypothyroid drug, Levothryoxine, do?
Activation of nuclear receptors, gene expression, and protein synthesis
What are the side effects of Levothyroxine?
Cardiovascular (tachycardia, arrhythmia, MI), CNS (headache, nervousness, insomnia, irritability, GI (diarrhea, vomiting, cramps), weight loss
Which hyperthyroid drug inhibits both thyroid peroxidase reactions and 5’-deiodinase?
Propylthiouracil (Methimazole preferred to PTU except during the 1st trimester of pregnancy and in thyroid storms)
What are the side effects of Propylthiouracil?
Nausea, GI distress, hepatitis (black box warning), hypothyroidism, agranulocytosis is rare but life-threatening side effect of thiomides. PTU has higher hepatotoxicity than methimazole.
Which hyperthyroid drug inhibits thyroid peroxidase reactions?
Methimazole (Methimazole is preferred to PTU except in the 1st trimester of pregnancy and in thyroid storm)
What are the side effects of Methimazole?
Nausea, GI distress, hepatitis (black box warning), hypothyroidism, agranulocytosis is rare but life-threatening side effect of thiomides. Methimazole causes serious congenital defects.
Which hyperthyroid drug inhibits iodine organification and hormone release; reduces size and vascularity of the thyroid gland?
Potassium Iodide (SSKI)
What is potassium Iodide (SSKI) used for?
Preparation for surgical thyroidectomy; Thyroid storm
What are the side effects of Potassium Iodide (SSKI)?
Side effects are rare.
Which hyperthyroid drug inhibits β receptors and the conversion of T4 to T3?
Propranolol