- Statins primarily lower LDL cholesterol to reduce heart attack and stroke risk
- They may protect kidney function, especially in patients with diabetic kidney disease
- A long-term study links statins to higher risks of AKI, CKD, and kidney inflammation
Statins are a class of medications primarily used to lower cholesterol levels in the blood. They primarily lower (bad) LDL cholesterol, which further helps lower the risk of heart attacks and stroke. Statins work by inhibiting an enzyme in the liver that is responsible for producing cholesterol, making them a common prescription for individuals with high cholesterol or those at risk for heart-related conditions. Beyond their primary function of lowering cholesterol, statins offer several additional benefits. They are also known to have a protective effect on kidney function, particularly in individuals with existing kidney disease.
The impact of statins on kidney function:
- Studies indicate that statins may have protective effects against kidney disease progression in patients with certain conditions, such as diabetic kidney disease.
- Some studies also suggest that statin use is associated with a reduced risk of acute kidney injury and other adverse kidney events, especially in patients at higher risk.
However, a long-term study suggests that taking statins for many years might be linked to a higher risk of developing kidney problems. The study examined over 40,000 patients for about 8.4 years, comparing people who took statins to a very similar group of people who did not.
Findings of the study
While statins are widely known to protect the heart and prevent strokes, this specific study suggests that taking them over a long period might be linked to a higher risk of developing kidney problems.
Most clinical trials for statins last only a few years and usually show that statins are safe or even helpful for the kidneys. However, this study looked at patients over a much longer time and found the opposite.
- Increased risk of kidney damage: Statin users were more likely to develop three specific types of kidney issues compared to non-users:
- Acute kidney injury (AKI): A sudden episode of kidney failure or damage (30% higher risk)
- Chronic kidney disease (CKD): A long-term condition where the kidneys don't work as well as they should (36% higher risk)
- Kidney inflammation/scarring: Conditions like nephritis or renal sclerosis (35% higher risk)
- Risk exists even in healthy people: Even when the researchers looked only at a subset of healthy patients who had no other major health problems at the start, the link between statin use and chronic kidney disease remained.
- Difference between trials and real life: The authors suggest that the short-term benefits seen in controlled medical trials might change when people take these drugs for a decade or more in everyday life.
The researchers have also mentioned that it does not mean statins definitely cause kidney disease, only that there is a statistical link that deserves more attention.
If you are currently taking statins, you should not stop taking them based on this study alone. Statins provide massive, proven benefits for heart health. If you have concerns, you should always discuss them with your doctor before starting or stopping any medication.
Statins can offer several benefits beyond lowering cholesterol:
- Anti-inflammatory effects
Statins have anti-inflammatory properties that may help to reduce inflammation in the arteries, a key factor in the development of atherosclerosis (the buildup of plaque in the arteries).
- Stabilisation of plaques
Statins can stabilise the plaques in the arteries, making them less likely to rupture and cause heart attacks.
- Improved endothelial function
Statins have been shown to improve the function of the endothelium (the inner lining of blood vessels), which plays an essential role in vascular health and regulation of blood flow.
- Reduced risk of other conditions
Research suggests that statins may lower the risk of conditions such as diabetes, certain types of cancer, and dementia, although these benefits are still being studied.
The relationship between statins and the kidneys is complex. It's important for individuals on statins to have a discussion with their doctor about their overall health, including kidney function and any potential side effects.
Disclaimer: This content including advice provides generic information only. It is in no way a substitute for a qualified medical opinion. Always consult a specialist or your own doctor for more information. NDTV does not claim responsibility for this information.
