Alzheimer's, Dementia & Mental Health
Statins Appear to Reduce Risk of Depression in Heart Patients
Statins may have long-term protective effect against depression, perhaps by helping to prevent atherosclerosis in the brain
Feb. 25, 2012 Senior citizens the primary users of cholesterol-lowering statins may look forward to less depression
if they have been prescribed the drugs for heart disease. A new long-term study finds these statin users are much less likely to suffer
depression than non-users.
The study, led by Mary Whooley, MD, a physician at the San Francisco VA Medical Center and a professor of medicine at the
University of California, San Francisco, was published this week in the digital edition of the Journal of Clinical Psychiatry.
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Alzheimer's, Dementia & Mental Health
Whooley and her research team evaluated 965 heart disease patients for depression, and found that the patients who were
on statins were significantly less likely to be clinically depressed than those who were not.
They then followed the 776 patients who were not depressed 520 who were using statins and 256 who were not for an
additional six years.
Of those taking statins, 18.5 percent developed depression, compared with 28 percent of those not on the drugs. Put
another way, the patients who took statins were 38 percent less likely to develop depression than patients who did not.
As the study went on, said Whooley, the difference between the two groups became more pronounced, with the patients on
statins becoming less likely to develop depression and the patients not on statins becoming more likely to become depressed over time.
"This would suggest that statins may have some kind of long-term protective effect against depression, perhaps by helping
to prevent atherosclerosis in the brain, which can contribute to depressive symptoms," Whooley said.
She also noted that statins have positive effects on the endothelium the inner lining of the blood vessels keeping
blood vessels less rigid and therefore better able to adapt to the body's changing needs. "The exact mechanism is not known, however, and
requires further study," she said.
Whooley cautioned that it is possible that patients who take statins "are just healthier overall than those who don't,
and somehow we're not accounting for that in our analysis, even though we adjusted for factors such as smoking, physical activity and
If statins are definitively proven to protect against depression, said Whooley, they could be used to reduce the burden
of depressive symptoms in patients with heart disease and, by extension, improve cardiovascular outcomes in depressed patients.
Whooley has shown in previous studies that heart disease patients with depression are less likely to exercise and take
medication, thus increasing their risk for heart attack, stroke, and other cardiovascular events.
Statins are the most commonly-prescribed medication in the world, according to the study authors. "They are relatively
safe, and generally well-tolerated," said Whooley.
Co-authors of the study are Christian Otte, MD, of Charite΄ University Medical Center, Berlin, Germany, and Shoujun Zhao,
PhD, of SFVAMC and UCSF.
The study was supported by funds from the Department of Veterans Affairs, the National Heart, Lung and Blood Institute,
the Robert Wood Johnson Foundation, the American Federation for Aging Research, the Ischemia Research and Education Foundation and the
National Alliance for Research in Schizophrenia and Depression. Some of the funds were administered by the Northern California Institute for
Research and Education.
NCIRE - The Veterans Health Research Institute - is the largest research institute associated with a VA medical center.
Its mission is to improve the health and well-being of veterans and the general public by supporting a world-class biomedical research program
conducted by the UCSF faculty at SFVAMC.
SFVAMC has the largest medical research program in the national VA system, with more than 200 research scientists, all of
whom are faculty members at UCSF.
UCSF is a leading university dedicated to promoting health worldwide through advanced biomedical research, graduate-level
education in the life sciences and health professions, and excellence in patient care.
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