(Press-News.org) ANN ARBOR, Mich. -- Patients with head and neck cancer who used antacid medicines to control acid reflux had better overall survival, according to a new study from the University of Michigan Comprehensive Cancer Center.
Reflux can be a common side effect of chemotherapy or radiation treatment for head and neck cancer. Doctors at the University of Michigan frequently prescribe two types of antacids - proton pump inhibitors or histamine 2 blockers - to help treat this side effect.
The researchers looked at 596 patients who were treated for head and neck cancer. More than two-thirds of the patients took one or both types of antacid medication after their diagnosis.
Patients who were taking antacids had significantly better overall survival than those who did not take them. Proton pump inhibitors, which include drugs such as Prilosec, Nexium and Prevacid, had the biggest effect: a 45 percent decreased risk of death, compared to patients who did not take antacids. Patients taking histamine 2 blockers, such as Tagamet, Zantac or Pepcid, saw a 33 percent decreased risk of death.
"We had suspicions that these medications somehow had a favorable impact on patient outcomes. This led us to review our large cohort of patients and screen them for common medications, focusing on antacids. In fact, our study did show that people taking antacids are doing better," says lead study author Silvana Papagerakis, M.D., Ph.D., research assistant professor of otolaryngology--head and neck surgery at the University of Michigan Medical School and an adjunct clinical assistant professor at the U-M School of Dentistry.
Results of the study are published in the December issue of Cancer Prevention Research.
The researchers are not clear why these medications affect the cancer, although they have begun additional work to understand the mechanisms involved.
"Currently, patients might be on and off of this medication according to their symptoms of acid reflux. We believe this medication can also be beneficial at stopping cancer progression. Perhaps longer duration of treatments may have significant effect in terms of outcome survival," Papagerakis says.
In addition, the researchers would like to understand if using antacids in people with reflux disease or people with precancerous lesions might reduce their risk of developing head and neck cancer.
Antacids are seen as relatively safe and typically have little or no adverse side effects. More importantly, Papagerakis notes, head and neck cancer patients are already taking these medications.
"What this study makes clear is these medications may be more beneficial to the patients than just controlling side effects," she says.
INFORMATION:
Note to Patients
More studies are needed before antacids can be recommended for all patients with head and neck cancer. Consult your doctor before taking any new medications.
Additional Authors
Emily Bellile, Lisa A. Peterson, Maria Pliakas, Katherine Balaskas, Sara Selman, David Hanauer, Jeremy M.G. Taylor, Sonia Duffy, Gregory Wolf
Funding
National Cancer Institute/ National Institute of Dental and Craniofacial Research grant P50 CA097248, American Cancer Society grant RSG-13-103-01, University of Michigan
Disclosure
None
Reference
Cancer Prevention Research, Vol.7, No. 12, December 2014
Resources
U-M Cancer AnswerLine, 800-865-1125
U-M Comprehensive Cancer Center, http://www.mcancer.org
Clinical trials at U-M, http://www.mcancer.org/clinicaltrials
mCancerTalk blog, http://uofmhealthblogs.org/cancer
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