According to a survey of heart patients, researchers found that nearly three-quarters use some kind of alternative medicine, and almost a third take dietary supplements that could thwart their prescription medications. Kline-Rogers, at the University of Michigan Health System, found that heart patients seem to be turning to alternative therapies even more than the general population, even while they stick to mainstream drugs too.//
"But they may not know that some of these substances could pose a hazard when taken with certain heart medications, and if they don't tell their doctors, the risk may go undetected,'' said Kline-Rogers, who presented the results before the American College of Cardiology meeting in Atlanta.
The study involved 100 patients who had been hospitalized for heart attack or angina within the past six months before being surveyed by phone last year. Seventy-four percent of the patients used complementary-alternative therapy, with 50 percent using supplements, vitamins or herbs and 35 percent using mind-body practices like yoga or body-manipulation techniques like massage. Many used both supplements and various mind-body techniques.
Most said they used the alternative therapies to help them heal or ease their symptoms.
But particularly troubling was that 42 % of the patients were taking at least one blood-thinning prescription medication and one dietary supplement that could also reduce clotting.
Most heart patients have a prescription to take aspirin or other blood thinners to prevent clotting and reduce the risk of heart attack or stroke. But supplements such as ginkgo biloba, ginseng, garlic, vitamin E, fish oil or coenzyme Q10 also have anticoagulant effects, but don't have doses that have been carefully controlled or studied.
In addition to the threat of uncontrolled bleeding from doubling up on blood thinners, health professionals worry that there may be other interactions between s
upplements and drugs. Fortunately, 70 percent of those taking supplements, vitamins or herbs told their doctors what they were taking. The rest either didn't think it was necessary, didn't want to discuss it or said their doctors didn't ask.
The researchers noted that other complementary or alternative medicine approaches ranging from prayer, meditation and yoga to chiropractic and acupuncture therapy don't pose any specific hazard when combined with conventional heart treatments.
Kline-Rogers and her colleagues are now working on a larger study of heart patients. This study would repeat the original questions, but also ask about the intake of beverages, such as green tea and red wine, that can also affect clotting, and inquire if they have experienced minor bleeding symptoms.
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