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Study Links Painkillers with Breast Cancer

Washington, Jun 1 (Prensa Latina) A new study suggests that the long-term use of painkillers like aspirin and ibuprofen might increase the risk of breast cancer, according to a report from the Journal of the National Cancer Institute, published on Wednesday.

According to the study, the daily use of aspirin increases the risk of estrogen receptor/progesterone receptor (ER/PR), negative breast tumors, while the prolonged daily use of ibuprofen increases the risk of non-localized breast cancer.

The study, by Sarah F Marshall and her team from the University of Southern California, tracked the health of 114,460 women aged between 22 and 85 years, who participated in the California Teachers Study.

All participants were healthy when they joined the study in 1995 and 1996, but over the next six years, 2,391 women were found to have breast cancer.

"We were expecting ibuprofen to reduce risk, and the same for aspirin. These drugs are not preventing breast cancer as earlier studies suggested that they might," Sarah Marshall said.

Los Angeles, CA, Jun. 1 (UPI) -- Taking aspirin or ibuprofen daily for at least five years may increase women's risk of breast cancer, a California teacher study indicates. However, the research team said it was not certain if the risk is merely "casual," particularly since its massive study found no increased risk of breast cancer for shorter-term, less frequent use of the non-steroidal anti-inflammatory drugs, or NSAIDs.

For the long-term use, women who took aspirin were 80 percent more likely to develop breast cancer while women who took ibuprofen were 50 percent more likely to develop the disease.

The findings were the opposite of other recent studies. The team reported results of its study of 114,460 California teachers in the Journal of the National Cancer Institute. Lead researcher Sarah Marshall of the University of Southern California said she had expected the NSAIDs to reduce the risk of breast cancer.

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