Nephrotoxicity is a side effect of one of the following immuno-suppressives –
**Core Concept**
Nephrotoxicity is a well-documented side effect of certain immunosuppressive medications, particularly those that affect renal function or electrolyte balance. This is often due to the drug's impact on renal hemodynamics, tubular function, or electrolyte handling.
**Why the Correct Answer is Right**
The correct answer is **Cyclosporine**. Cyclosporine is a calcineurin inhibitor that affects renal function by inhibiting the sodium-potassium ATPase pump in the proximal convoluted tubule, leading to sodium retention, potassium wasting, and subsequent vasoconstriction of the renal vessels. This results in decreased renal blood flow and glomerular filtration rate, causing nephrotoxicity.
**Why Each Wrong Option is Incorrect**
* **Option A:** **Azathioprine** is not typically associated with nephrotoxicity. While it can cause bone marrow suppression and hepatotoxicity, nephrotoxicity is not a common side effect.
* **Option B:** **Mycophenolate Mofetil** is not known for nephrotoxicity. It can cause gastrointestinal side effects, bone marrow suppression, and infections, but nephrotoxicity is not a major concern.
* **Option D:** **Tacrolimus** is another calcineurin inhibitor like Cyclosporine and can cause nephrotoxicity. However, the question likely seeks a single answer, and the correct answer is Cyclosporine.
**Clinical Pearl / High-Yield Fact**
When administering immunosuppressive medications, it is essential to monitor renal function and electrolyte balance closely, particularly with Cyclosporine and Tacrolimus, to prevent nephrotoxicity and other complications.
**Correct Answer: C. Cyclosporine**