Navigation Links
More evidence suggests diabetes drug may be dangerous

TORONTO, Dec. 11 /PRNewswire/ - A popular class of drugs for treating type 2 diabetes is under scrutiny again. A new Canadian study released by the Institute for Clinical Evaluative Sciences (ICES) finds that drugs such as Avandia increase the risk of heart failure, heart attacks and death.

Published in the December 12th issue of JAMA, ICES scientists looked at the glitazone class of drugs including rosiglitazone (Avandia) and pioglitazone (Actos) in the first real world population-based study of its kind. All Ontario residents aged 65 years or older, treated with at least one oral diabetic medication were followed between 2002 and 2006. "The necessity for evaluating diabetes drug outcomes in older patients is reinforced by the fact that seniors have the highest prevalence of diabetes and represent over 40% of the population with the disease," says lead author and ICES researcher, Dr. Lorraine Lipscombe. "We cannot be certain whether similar effects would be seen in younger patients. Our study represents a concern for older patients taking these drugs who are at higher risk for adverse cardiac outcomes."

The ICES study explored three distinct outcomes using Ontario health care databases: hospital visits for congestive heart failure, hospital visits for heart attacks and death from any cause, and looked at exposure to specific diabetes drugs in seniors. Compared to other diabetes pills glitazones (Avandia & Actos ) are associated with the following results:

- 60% relative increase in heart failure, 40% relative increase in

heart attacks, 30% relative increase in death.

- This translates into an estimated 3 additional episodes of heart

failure, 4 additional heart-attacks and 5 additional deaths for every

100 individuals taking these drugs, over a 4 year period in a high-

risk older population.

- Risk predominantly among those taking rosiglitazone (Avandia).

- Smaller numbers of people received the other drug pioglitazone

(Actos), limiting our ability to be certain about adverse events in

this group.

Co-author and Senior ICES Scientist, Dr. David Alter says, "We don't want people to panic. Treatment decisions must remain individualized with doctors and patients weighing the potential harms and benefits of these drugs, especially when used among the elderly who are at higher-risk of cardiac complications."

The Ontario based ICES study comes on the heels of the Food and Drug Administration (FDA) slapping a prominent black box label warning on the popular diabetes drug Avandia telling patients that it may, or may not, increase the risk of heart attacks. It is the most severe type of warning the agency can require pending further research. Glaxo Smith Kline, Avandia's manufacturer has agreed to do a longer term study comparing the drug to other medications, but those results won't be available for another six years. Since the drug's approval in 1999, more than 7 million people worldwide have taken Avandia, designed to increase the body's sensitivity to insulin, generating sales worth $3 billion annually.

"Our study demonstrates the importance of post-marketing surveillance of new drugs. Manufacturers are often required to only demonstrate diabetes medications lower blood sugar not that they prevent long term consequences of diabetes. Research trials are often insufficient to detect less common adverse effects of drugs, so ongoing safety monitoring of drug side effects in larger real-world populations is vital. Experts from regulatory bodies such as Health Canada and the Food and Drug Administration will have to consider our findings in the context of all the evidence so far, to decide the future of these drugs," says Dr. Lipscombe.

The study 'Thiazolidinediones and Cardiovascular Outcomes in Older Patients with Diabetes' is in the December issue of JAMA.

Author affiliations: ICES (Drs. Lipscombe, Hux, Juurlink, Alter, Ms. Gomes, Levesque); (Drs. Lipscombe, Hux, Juurlink, Alter) Department of Medicine, University of Toronto; (Drs. Hux, Juurlink, Alter) Department of Health Policy, Management and Evaluation, University of Toronto; (Dr.Lipscombe) Women's College Hospital; (Drs. Hux, Juurlink) Sunnybrook Health Sciences Centre; Toronto, Ontario; (Ms. Levesque) Dept. of Community Health and Epidemiology, Queen's University; (Ms. Levesque) Kingston, Lennox, Frontenac& Addington (KFL&A) Public Health, Kingston, Ontario. The authors have no conflict of interest to declare.

ICES is an independent, non-profit organization that uses population-based health information to produce knowledge on a broad range of health care issues. Our unbiased evidence provides measures of health system performance, a clearer understanding of the shifting health care needs of Ontarians, and a stimulus for discussion of practical solutions to optimize scarce resources. ICES knowledge is highly regarded in Canada and abroad, and is widely used by government, hospitals, planners, and practitioners to make decisions about care delivery and to develop policy.

SOURCE Institute for Clinical Evaluative Sciences
Copyright©2007 PR Newswire.
All rights reserved

Related medicine news :

1. Jefferson researchers uncover new evidence of prolactins possible role in breast cancer
2. No strong evidence linking amateur boxing with long-term brain injury
3. AHRQ Announces Next Phase of Its Evidence-Based Practice Center Program
4. Vanderbilt Medical Center chosen as Evidence-based Practice Center
5. Little Evidence Silicone Breast Implants Harm Health
6. Consumers Should Demand Evidence, Not Guesswork, On Meat-Cancer Links
7. U of M study: Medicare lacks tools, incentives to enforce evidence-based coverage policies
8. New Study Provides Scientific Evidence That DermaLastyl Face Cream Reduces Wrinkles
9. Scientific evidence of the significant anti-cancer effect of milk thistle
10. Defining the Value of Medicine in an Evidence-Based Healthcare Marketplace
11. UC Davis researchers find evidence of mature heart cell potential in embryonic stem cells
Post Your Comments:
(Date:6/26/2016)... ... June 26, 2016 , ... PawPaws brand pet supplements ... was developed to enhance the health of felines. The formula is all-natural and is ... herbs in the PawPaws Cat Kidney Support Supplement Soft Chews are Astragalus ...
(Date:6/25/2016)... ... June 25, 2016 , ... The temporary closing of Bruton Memorial Library on June 21 ... brings up a new, often overlooked aspect of head lice: the parasite’s ability to live ... not a common occurrence, but a necessary one in the event that lice have simply ...
(Date:6/25/2016)... ... June 25, 2016 , ... On Friday, June 10, Van Mitchell, Secretary ... Work award to iHire in recognition of their exemplary accomplishments in worksite health promotion. ... Maryland Workplace Health & Wellness Symposium at the BWI Marriott in Linthicum Heights. iHire ...
(Date:6/24/2016)... ... ... Marcy was in a crisis. Her son James, eight, was out of control. Prone to ... , “When something upset him, he couldn’t control his emotions,” remembers Marcy. “If there ... my other children and say he was going to kill them. If we were ...
(Date:6/24/2016)... Rhinebeck, NY (PRWEB) , ... June 24, 2016 , ... Topical BioMedics, Inc, makers of ... of companies that call for a minimum wage raise to $12 an hour by 2020 ... wage. This will restore the lost value of the minimum wage, assure the wage floor ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... , June 24, 2016  Consumers have taken ... regulators/payers have placed more emphasis on patient outcomes. ... support programs in the pharmaceutical industry have evolved ... Consequently, pharmaceutical companies are focusing on becoming more ... providing products and services that improve health. ...
(Date:6/24/2016)... SAN FRANCISCO, Calif. , June 24, 2016 ... GBT ), a biopharmaceutical company developing novel therapeutics ... significant unmet needs, today announced the closing of ... shares of common stock, at the public offering ... shares in the offering were offered by GBT. ...
(Date:6/24/2016)... 24, 2016 ... the addition of the " Global Markets for ... This report focuses on ... updated review, including its applications in various applications. The ... which includes three main industries: pharmaceutical and biotechnology, food ...
Breaking Medicine Technology: