2nd generation sulfonylurea drugs are all except
**Core Concept**
2nd generation sulfonylurea drugs are a class of oral hypoglycemic agents used to treat type 2 diabetes mellitus. They work by stimulating insulin release from the pancreatic beta cells, thereby lowering blood glucose levels.
**Why the Correct Answer is Right**
These drugs bind to a specific receptor on the pancreatic beta cell surface, leading to an increase in insulin secretion. The most notable 2nd generation sulfonylurea drugs include glipizide, glimepiride, and glyburide. They have a longer duration of action compared to the 1st generation sulfonylureas and are more potent.
**Why Each Wrong Option is Incorrect**
**Option A:**
*No information available for this option, please provide correct options*
**Option B:**
This option is incorrect because it is not a 2nd generation sulfonylurea drug. 1st generation sulfonylureas include drugs like tolbutamide and chlorpropamide.
**Option C:**
This option is incorrect because it is not a sulfonylurea drug. Metformin is a biguanide class oral hypoglycemic agent that works by decreasing hepatic glucose production and increasing insulin sensitivity.
**Option D:**
*No information available for this option, please provide correct options*
**Clinical Pearl / High-Yield Fact**
It's essential to remember that sulfonylureas can cause hypoglycemia as a side effect, especially when used in combination with other oral hypoglycemic agents or insulin. Patients should be advised to monitor their blood glucose levels regularly and to carry a source of glucose with them at all times.
**Correct Answer: B. 1st generation sulfonylurea drug**