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Pharmacology · USMLE Step 1 · Healthcare and Nursing

USMLE Pharmacology: Endocrine Drugs

Diabetes, thyroid, and hormone replacement drug classes with mechanism and one signature side effect per card.

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36 mixed cards for USMLE Step 1 Pharmacology. Set 10 of 19 in USMLE Pharmacology. It opens with "What is the primary mechanism of action of metformin?" and "What serious adverse effect is linked to metformin, especially with renal". Study it alongside the other USMLE Step 1 sets below.

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What is the primary mechanism of action of metformin?
Show answerDecreases hepatic gluconeogenesis
What serious adverse effect is linked to metformin, especially with renal impairment?
Show answerLactic acidosis
How do sulfonylureas such as glipizide and glyburide stimulate insulin release?
Show answerThey close ATP-sensitive potassium channels on pancreatic beta cells
Because sulfonylureas stimulate insulin release regardless of glucose level, their most common adverse effect is ____.
Show answerhypoglycemia
Besides hypoglycemia, what other adverse effect is common with sulfonylureas?
Show answerWeight gain
Thiazolidinediones (e.g., pioglitazone) act as agonists at which nuclear receptor?
Show answerPPAR-gamma
What adverse effect makes thiazolidinediones risky in patients with heart failure?
Show answerFluid retention and edema
What enzyme do DPP-4 inhibitors such as sitagliptin block?
Show answerDipeptidyl peptidase-4 (DPP-4)
What potential adverse effect is associated with DPP-4 inhibitors?
Show answerPancreatitis
What gastrointestinal side effect is most common with GLP-1 receptor agonists?
Show answerNausea and vomiting
What is the mechanism of action of SGLT2 inhibitors such as empagliflozin?
Show answerThey block glucose reabsorption in the proximal convoluted tubule
SGLT2 inhibitors can cause a rare complication called ____, where ketoacidosis occurs despite near-normal blood glucose.
Show answereuglycemic diabetic ketoacidosis
What is the mechanism of action of acarbose?
Show answerInhibits intestinal alpha-glucosidase, delaying carbohydrate absorption
Besides hypoglycemia, what electrolyte abnormality can insulin therapy cause?
Show answerHypokalemia
What hormone deficiency does levothyroxine treat?
Show answerHypothyroidism (thyroid hormone, T4, deficiency)

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