## **Core Concept**
Pancreatitis as a side effect is associated with certain medications. This question tests knowledge of drug-induced pancreatitis, a condition where certain drugs can cause inflammation of the pancreas.

## **Why the Correct Answer is Right**
The correct answer, **D. Azathioprine**, is a medication known to cause pancreatitis as a rare but serious side effect. Azathioprine is an immunosuppressive medication used to prevent the rejection of transplanted organs and to treat autoimmune diseases. It works by inhibiting purine synthesis, which affects the proliferation of T and B lymphocytes. The mechanism by which azathioprine causes pancreatitis is not entirely clear, but it is believed to be related to its toxic effects on the pancreas.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and does not provide a specific drug to evaluate.
- **Option B:** Similarly, this option is blank and cannot be assessed.
- **Option C:** This option is also blank, making it impossible to determine its accuracy.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that drug-induced pancreatitis can be caused by a variety of medications, including azathioprine, certain antibiotics, and antiretroviral drugs. Clinicians should be aware of the potential for pancreatitis when prescribing these medications and monitor patients for symptoms such as abdominal pain and elevated pancreatic enzymes.

## **Correct Answer: D. Azathioprine**