Antihypeensive of choice in a patient of diabetes mellitus with proteinuria is –
**Core Concept**
The management of hypertension in patients with diabetes mellitus and proteinuria requires careful consideration of the potential impact on renal function and glycemic control. The ideal antihypertensive agent should not only effectively lower blood pressure but also protect the kidneys from further damage.
**Why the Correct Answer is Right**
In patients with diabetes mellitus and proteinuria, the renin-angiotensin-aldosterone system (RAAS) plays a crucial role in the progression of renal disease. Angiotensin-converting enzyme inhibitors (ACEIs) or angiotensin receptor blockers (ARBs) are the preferred antihypertensive agents in this population because they block the RAAS, reducing intraglomerular pressure and proteinuria. This class of drugs has been shown to slow the progression of diabetic nephropathy and reduce the risk of cardiovascular events.
**Why Each Wrong Option is Incorrect**
**Option A:** Thiazide diuretics, while effective in lowering blood pressure, can worsen proteinuria and worsen glycemic control by increasing glucose levels and reducing insulin sensitivity.
**Option B:** Beta-blockers, although useful in managing hypertension, do not provide the same level of renal protection as ACEIs or ARBs and can actually worsen proteinuria in some cases.
**Option C:** Calcium channel blockers, while effective in lowering blood pressure, do not provide the same level of renal protection as ACEIs or ARBs and can worsen proteinuria in some cases.
**Clinical Pearl / High-Yield Fact**
ACEIs and ARBs are not only effective in lowering blood pressure but also provide renal protection by reducing proteinuria and slowing the progression of diabetic nephropathy. They should be considered the first-line treatment for hypertension in patients with diabetes mellitus and proteinuria.
**Correct Answer:** C.