Which antidiabetic drug is used both for type I& II DM –
**Core Concept**
The question is testing the student's knowledge of antidiabetic medications that can be used in both type I and type II diabetes mellitus (DM). This requires an understanding of the pathophysiology of both types of diabetes and the mechanism of action of various antidiabetic drugs.
**Why the Correct Answer is Right**
The correct answer is Glibenclamide, a sulfonylurea that stimulates insulin release from the pancreatic beta cells. In type I DM, exogenous insulin is required due to the lack of functional beta cells, but in type II DM, the body may still have some residual beta-cell function. Glibenclamide can be used in type II DM to enhance insulin secretion and improve glycemic control. It can also be used in type I DM to help control blood sugar levels, especially in patients who are not adequately controlled with insulin alone.
**Why Each Wrong Option is Incorrect**
* **Option A:** Metformin is primarily used in type II DM to decrease hepatic glucose production and increase insulin sensitivity. It is not typically used in type I DM.
* **Option B:** Pioglitazone is a thiazolidinedione that increases insulin sensitivity and is primarily used in type II DM. It is not typically used in type I DM.
* **Option C:** Sitagliptin is a DPP-4 inhibitor that increases endogenous insulin secretion and decreases glucagon levels. It is primarily used in type II DM and is not typically used in type I DM.
**Clinical Pearl / High-Yield Fact**
It's worth noting that the use of sulfonylureas like Glibenclamide in type I DM is generally reserved for patients who are not adequately controlled with insulin alone, and close monitoring of blood sugar levels and insulin doses is essential to avoid hypoglycemia.
**Correct Answer:** C. Glibenclamide.