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Entries in bone fractures (2)

Thursday
Jun282012

New Studies on Acid Reflux preventing drugs find serious side effects. 

In an effort to prevent acid reflux, many turn to drugs promising a reduction or prevention of it entirely, but what they don't mention in the TV advertisements is the extent of the potential side effects. 

From the NYTIMES: 

Long-term use of the drugs, called proton pump inhibitors, or P.P.I.’s, can make it difficult to absorb some nutrients. Ms. Rudell, 33, has been taking these medications on and off for nearly a decade. Her doctor treated her anemia with high doses of iron, and recommended she try to manage without a P.P.I., but that’s been difficult, she said. “I’m hoping I’ll get off the P.P.I. after I complete my residency training,” she said, “but that’s still several years away.”

As many as four in 10 Americans have symptoms of gastroesophageal reflux disease, or GERD, and many depend on P.P.I.’s like Prilosec, Prevacid and Nexium to reduce stomach acid. These are the third highest-selling class of drugs in the United States, after antipsychotics and statins, with more than 100 million prescriptions and $13.9 billion in sales in 2010, in addition to over-the-counter sales.

But in recent years, the Food and Drug Administration has issued numerous warnings about P.P.I.’s, saying long-term use and high doses have been associated with an increased risk of bone fractures and infection with a bacterium called Clostridium difficile that can be especially dangerous to elderly patients. In a recent paper, experts recommended that older adults use the drugs only “for the shortest duration possible.”

Studies have shown long-term P.P.I. use may reduce the absorption of important nutrients, vitamins and minerals, including magnesium, calcium and vitamin B12, and might reduce the effectiveness of other medications, with the F.D.A. warning that taking Prilosec together with the anticlotting agent clopidogrel (Plavix) can weaken the protective effect (of clopidogrel) for heart patients.

Other research has found that people taking P.P.I.’s are at increased risk of developing pneumonia; one study even linked use of the drug to weight gain.

Monday
May302011

New Study: Calcium Supplements do not reduce chances of osteoporosis. 

A new study published in the British Medical Journal1 found that people who consumed the highest amounts of calcium did not have a reduction in bone fractures or osteoporosis. In fact, those who consumed the most calcium (more than 1137 milligrams per day) had higher rates of hip fractures and similar rates of osteoporosis, compared with those who consumed less. Researchers looked at 61,433 Swedish women over 19 years and concluded no significant benefit to consuming more than 700 milligrams of calcium per day for bone health.

Previous studies have shown similar results. The Nurses’ Health Study,2 which followed more than 75,000 women for 18 years, showed no protective effect of increased milk consumption on fracture risk. Similarly, a 1994 study of elderly men and women in Sydney, Australia, showed that higher dairy product consumption was associated with increased fracture risk. Those with the highest dairy product consumption had approximately double the risk of hip fracture compared with those with the lowest consumption.3

People may want to consider the risks to over consuming calcium. An elevated risk of prostate cancer incidence and mortality has been associated with dairy consumption,4,5 and the same may be true for ovarian cancer.6

1. Warensjo E, Byberg L, Melhus H, et al. Dietary calcium intake and risk of fracture and osteoporosis: prospective longitudinal cohort study. BMJ. 2001;342:d1473.

2. Feskanich D, Willett WC, Colditz GA. Calcium, vitamin D, milk consumption, and hip fractures: A prospective study among postmenopausal women. Am J Clin Nutr. 2003;77:504-511.

3. Cumming RG, Klineberg RJ. Case-control study of risk factors for hip fractures in the elderly. Am J Epidemiol. 1994;139:493-503.

4. Chan JM, Stampfer MJ, Ma J, Gann PH, Gaziano JM, Giovannucci E. Dairy products, calcium, and prostate cancer risk in the Physicians’ Health Study. Am J Clin Nutr. 2001;74:549-554.

5. Chan JM, Gann PH, Giovannucci EL. Role of diet in prostate cancer development and progression.J Clin Oncol. 2005;23:8152-8160.

6. Cramer DW, Harlow BL, Willet WC. Galactose consumption and metabolism in relation to the risk of ovarian cancer. Lancet. 1989;2:66-71.