Does taking a daily aspirin tablet can help prevent a heart attack? Think again. Doctors are reversing that recommendation in the latest guidelines from the American Heart Association. Experts have long suggested that taking a low-dose aspirin each day can prevent cardiovascular issues, but a recent clinical trial found it had no effect among older patients, and could even lead to other health issues like hemorrhages or ulcers. Instead, doctors recommend keeping blood pressure and cholesterol low and maintaining a healthy lifestyle with diet and exercise.