Which among the following is not a cause of hypoglycaemia?
**Core Concept**
Hypoglycaemia is a condition characterized by abnormally low blood glucose levels, typically defined as a plasma glucose concentration below 54 mg/dL. It can result from various causes, including excessive insulin secretion, impaired glucose production, and increased glucose utilization.
**Why the Correct Answer is Right**
To identify the correct answer, we need to analyze each option in the context of hypoglycaemia. The causes of hypoglycaemia can be broadly categorized into three main groups: excessive insulin action, impaired glucose production, and increased glucose utilization.
**Option A:** Insulin overdose is a well-known cause of hypoglycaemia, as it increases glucose uptake by cells, leading to a decrease in blood glucose levels.
**Option B:** Certain medications, such as sulfonylureas, can stimulate insulin release, causing hypoglycaemia.
**Option C:** Inadequate glucagon production or impaired glucagon action can also lead to hypoglycaemia, as glucagon stimulates glucose release from stored glycogen.
**Option D:** **Hypothyroidism is not typically associated with hypoglycaemia. In fact, hypothyroidism can lead to hyperglycaemia due to impaired glucose metabolism and insulin resistance.**
**Clinical Pearl / High-Yield Fact**
It's essential to remember that hypoglycaemia can occur in various clinical settings, including diabetes mellitus, critical illness, and postprandial states. Prompt recognition and treatment of hypoglycaemia are crucial to prevent serious complications.
**Correct Answer: D. Hypothyroidism is not typically associated with hypoglycaemia.**