TUESDAY, Feb. 26 (HealthDay News) -- Combining the vitamin niacin with a cholesterol-lowering statin drug appears to raise side effects in heart patients, a new study indicates.
Muscle, skin and gastrointestinal problems were among the side effects that caused one-quarter of patients to stop treatment in a study looking at whether the use of niacin in combination with a statin might reduce heart disease risk.
Niacin has long been used to boost levels of "good" HDL cholesterol and decrease levels of "bad" LDL cholesterol and triglycerides (fats) in the blood in people at risk for heart disease and stroke. However, niacin also causes a number of side effects, including flushing of the skin. A drug called laropiprant can reduce the incidence of flushing in people taking niacin.
This new study included nearly 26,000 patients with narrowing of the arteries. They received either 2 grams of extended-release niacin plus 40 milligrams of laropiprant or matching placebos. All of the patients also took the statin drug Zocor (simvastatin).
The patients from China, the United Kingdom and Scandinavia were followed for an average of almost four years. By the end of the study, 25 percent of patients taking niacin plus laropiprant had stopped their treatment, compared with 17 percent of the patients taking a placebo, according to the findings published online Feb. 26 in the European Heart Journal.
"The main reason for patients stopping the treatment was because of adverse side effects, such as itching, rashes, flushing, indigestion, diarrhea, diabetes and muscle problems," Jane Armitage, professor of clinical trials and epidemiology at the University of Oxford, said in a journal news release. "We found that patients allocated to the experimental treatment were four times more likely to stop for skin-related reasons, and twice as likely to stop because of gastrointestinal problems or diabetes-related problems."
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