Chronic kidney disease (CKD) can disrupt blood sugar control in several ways. While healthy kidneys help maintain glucose balance by breaking down insulin and producing glucose when needed, a decline in kidney function contributes to prolonged insulin in the , which can lower blood sugar levels more than expected. “This is especially important for people with diabetes who are on insulin or certain glucose-lowering drugs,” said Dr Sumiran Mahajan, consultant nephrologist, interventional nephrology and transplant services, KIMS Hospitals, Thane.
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It can happen, particularly in the later stages of kidney disease, continued Dr Mahajan. “Reduced appetite, dietary restrictions, nausea, and unintentional weight loss are common issues for many CKD patients and can lead to lower blood sugar levels. Sometimes, continue taking the same doses of diabetes medications even when their body’s insulin needs change, increasing the risk of hypoglycemia,” said Dr Mahajan.
Low blood sugar can cause sweating, shakiness, dizziness, weakness, hunger, headache, confusion, blurred vision, or trouble concentrating. “In severe cases, it may result in loss of consciousness if not treated quickly. Since some symptoms can be mild, regular monitoring is especially important for people dealing with both diabetes and kidney disease,” said Dr Mahajan.
Not necessarily, clarified Dr Mahajan. “A decrease in blood sugar levels should not be seen as a good sign. Often, it indicates changes in how the body processes insulin and medications as kidney function worsens. Any unexpected drop in blood sugar should be discussed with a healthcare professional to identify the cause,” said Dr Mahajan.
Dr Mahajan advised regular blood sugar monitoring, timely meals, reviewing medications, and routine check-ups. “Patients should never change their diabetes medications without consulting a doctor. As kidney disease advances, treatment plans often need adjustments to keep blood sugar in a safe range. Early recognition of symptoms and active management can help prevent complications and enhance overall ,” said Dr Mahajan.
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