Some diabetes drugs may increase risk of bladder cancer

July 3, 2012

An increased risk of bladder cancer is linked to the use of pioglitazone, a medication commonly used to treat type 2 diabetes, according to a new study published in CMAJ (Canadian Medical Association Journal).

People with are at risk of several , including a 40% increased risk of bladder cancer, compared to people without diabetes. Previous studies have shown a higher incidence of bladder cancer in people taking pioglitazone, a type of thiazolidinedione.

To determine whether there is a link between pioglitazone use and bladder cancer, researchers conducted a systematic review and meta-analysis of and observational studies involving over 2.6 million patients.

"We observed an increased risk of bladder cancer associated with the use of thiazolidinediones," writes Dr. Jeffrey Johnson, School of Public Health, University of Alberta, with coauthors. "In particular, use of pioglitazone was associated with an increased risk of bladder cancer based on a pooled estimate from three cohort studies involving more than 1.7 million individuals."

The researchers also looked at a possible association with rosiglitazone, another type of thiazolidinedione, but did not see an effect.

"Although the absolute risk of bladder cancer associated with pioglitazone was small, other evidence-based treatments for type 2 diabetes may be equally effective and do not carry a risk of cancer," conclude the authors. "This study quantifies the association between pioglitazone use and and may help inform decisions around safer use of pioglitazone in individuals with type 2 diabetes."

Explore further: Medical societies respond to the FDA's safety announcement on the use of Actos

More information: www.cmaj.ca/lookup/doi/10.1503/cmaj.112102

Related Stories

Recommended for you

Researchers thwart cancer cells by triggering 'virus alert'

August 27, 2015

Working with human cancer cell lines and mice, researchers at the Johns Hopkins Kimmel Cancer Center and elsewhere have found a way to trigger a type of immune system "virus alert" that may one day boost cancer patients' ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.