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Aspirin Does Not Prevent Heart Attacks In Patients With Diabetes, Study Suggests

Date:
October 20, 2008
Source:
BMJ-British Medical Journal
Summary:
Taking regular aspirin and antioxidant supplements does not prevent heart attacks even in high risk groups with diabetes and asymptomatic arterial disease, and aspirin should only be given to patients with established heart disease, stroke or limb arterial disease, according to a new study.

Taking regular aspirin and antioxidant supplements does not prevent heart attacks even in high risk groups with diabetes and asymptomatic arterial disease, and aspirin should only be given to patients with established heart disease, stroke or limb arterial disease, according to a study published on the British Medical Journal website.

In light of these findings, and the evidence from six other well controlled trials, the prescribing practice of doctors and international guidelines should be reviewed so that aspirin is only prescribed to patients with established heart and stroke disease, argues the author of an accompanying editorial.

Patients with diabetes are two to five times more likely to suffer from heart disease than the general population and heart disease is a major cause of death in patients with type 1 and 2 diabetes. Although there is considerable evidence showing no protective benefit of aspirin in high risk patients without heart disease, guidelines are inconsistent and aspirin is commonly prescribed for the primary prevention of heart disease in patients with diabetes and with peripheral arterial disease.

But aspirin is one of the top 10 causes of adverse drug events reported to the Commission on Human Medicines. It causes gastrointestinal bleeding and the risk of bleeding increases with age and prolonged use.

Professor Jill Belch and colleagues from Scotland investigated whether aspirin and antioxidants given together or separately can reduce heart attacks and death in patients with diabetes and arterial disease. 1276 patients with diabetes and evidence of artery disease over 40 years of age were randomised to receive either aspirin or placebo, an antioxidant or placebo, aspirin and antioxidant or double placebo, and followed over eight years.

Overall, the researchers found no benefit from either aspirin or antioxidant treatment in the prevention of heart attacks or death. Patients in the aspirin groups had 116 primary events compared with 117 in the placebo group. No significant difference in events was seen between the antioxidant group and the placebo group.

The authors conclude by voicing their concern at the widespread prescribing of aspirin despite the lack of evidence to support its use in the primary prevention of heart attacks and death in people with diabetes and in view of its possible side effects.

These findings show that unlike statins and drugs for reducing hypertension, which have a benefit in all risk groups including those with and without heart disease, only patients with a history of clinical or symptomatic heart disease or stroke disease benefit from taking aspirin, writes Professor William Hiatt in an accompanying editorial.


Story Source:

The above story is based on materials provided by BMJ-British Medical Journal. Note: Materials may be edited for content and length.


Journal Reference:

  1. The prevention of progression of arterial disease and diabetes: a factorial randomized placebo controlled trial of aspirin and antioxidants in patients with diabetes and asymptomatic peripheral arterial disease. British Medical Journal, (in press)

Cite This Page:

BMJ-British Medical Journal. "Aspirin Does Not Prevent Heart Attacks In Patients With Diabetes, Study Suggests." ScienceDaily. ScienceDaily, 20 October 2008. <www.sciencedaily.com/releases/2008/10/081016191814.htm>.
BMJ-British Medical Journal. (2008, October 20). Aspirin Does Not Prevent Heart Attacks In Patients With Diabetes, Study Suggests. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2008/10/081016191814.htm
BMJ-British Medical Journal. "Aspirin Does Not Prevent Heart Attacks In Patients With Diabetes, Study Suggests." ScienceDaily. www.sciencedaily.com/releases/2008/10/081016191814.htm (accessed July 31, 2014).

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