For decades, a daily low-dose aspirin was the go-to prescription for heart disease prevention. The tiny pill was considered a low-effort, high-reward approach to keeping heart attacks and strokes at bay. But recent research and evolving guidelines are prompting doctors to pump the brakes, especially when it comes to older adults.Historically, aspirin’s blood-thinning properties made it a staple for preventing blood clots, which are a major cause of heart attacks and strokes. This practice, known as "primary prevention," targeted people who had not yet experienced a cardiovascular event but were considered at risk due to age or other factors. A typical dose hovered around 81 milligrams per day.For individuals with a history of cardiovascular disease, aspirin’s benefits still hold. That’s "secondary prevention," and most experts still endorse it. But for older adults with no prior heart issues, new studies are revealing a more complicated risk-benefit balance.Newer clinical trials and large-scale studies began to challenge the once-universal recommendation. They found that for many older adults, particularly those over 60 or 70 without a history of heart disease, the risk of serious bleeding outweighed the potential cardiovascular benefits.As a result, leading health organizations have revised their guidelines:The American College of Cardiology (ACC) and American Heart Association (AHA) advise against daily aspirin for primary prevention in adults over 70.The U.S. Preventive Services Task Force (USPSTF) recommends against starting low-dose aspirin for primary prevention in adults over 60, and suggests a case-by-case approach for those aged 40-59 who have a 10% or greater 10-year cardiovascular risk.What Are The Hidden Risks Of Taking Aspirin?Aspirin is a nonsteroidal anti-inflammatory drug (NSAID) that reduces inflammation and prevents platelets from clumping together. But this same mechanism that reduces heart attacks also raises the risk of internal bleeding, particularly in the gastrointestinal (GI) tract and brain.Older adults are already more vulnerable to GI bleeding and hemorrhagic strokes. When aspirin is added to the mix, the potential for serious, sometimes fatal, complications increases.According to Dr. Jordan Schaefer, a hematologist at the University of Michigan Medical School, "For some patients without a history of cardiovascular disease, the benefits of taking aspirin may be offset by an increased risk of bleeding, especially as patients get older."A recent study published in the Journal of the American College of Cardiology surveyed over 2,500 adults between the ages of 50 and 80. It found that:About 1 in 6 older adults still take daily aspirin for primary prevention.Nearly 25% started aspirin use without a physician’s recommendation.Only 68% were aware that aspirin increases the risk of bleeding.Nearly 30% believed aspirin could reduce the risk of dementia.Younger respondents (aged 50-69) were twice as likely to use aspirin for primary prevention compared to those aged 70-80. Women and individuals with household incomes over $60,000 were also more likely to take aspirin preventatively.Dr. Mark Edwards, an internal medicine resident at University of Michigan Health and lead author of the study, pointed out that many patients believe aspirin offers wide-ranging health benefits, not just heart protection. "It appears that older adults taking aspirin may anticipate benefits beyond reducing the risk of cardiovascular disease and may not fully understand the added risk of bleeding," he said.Why Many Still Take Aspirin Without Doctor Guidance?Old habits die hard. For years, media campaigns and public health messaging endorsed the idea of a daily aspirin. Even today, some doctors haven’t updated their advice, and many patients continue on autopilot.Adding to the confusion, aspirin is available over-the-counter and has a reputation for being "harmless." Aspirin use is much more of a complex question than it once seemed, which is all the more reason why it is important to consult a health care provider when considering use.What Should Patients Over 40 Do?If you're over 40, the advice isn't to automatically start or stop aspirin. It's to have a thoughtful conversation with your doctor about your individual risk. Risk assessments often include:Personal and family history of heart diseaseBlood pressure and cholesterol levelsSmoking statusDiabetes or prediabetesOther medications that may increase bleeding riskBased on these factors, your doctor may calculate your 10-year risk of cardiovascular disease and guide your decision.What About People Already on Aspirin?If you’re over 60 and taking aspirin without a prior cardiovascular event, it’s time to revisit the plan. Do not stop abruptly without consulting your physician, especially if you have a stent, history of stroke, or previous heart attack.Experts recommend, anyone over 40 should talk to their provider about their risk for cardiovascular disease, with careful consideration of family and health histories.Aspirin isn’t a one-size-fits-all preventive tool anymore. For many healthy older adults, the risks outweigh the benefits, particularly when it comes to internal bleeding. Still, for those with a documented history of cardiovascular disease, aspirin remains a cornerstone of secondary prevention.Skip the DIY health decisions, talk to your doctor before starting or stopping any daily aspirin regimen. What once seemed like a harmless habit could be doing more harm than good.