Zinc Nasal Sprays Culprit in Loss of Smell
Zinc nasal sprays used to relieve symptoms of the common cold can cause anosmia, a loss of the sense of smell. This was the conclusion of Terence M. Davidson, MD, and Wendy M. Smith, MD, of the University of California San Diego, when they applied the nine Bradford Hill criteria to the relationship.
Intranasal zinc gluconate is a popular over-the-counter alternative therapy for treatment of the common cold, but it may also be linked to severe or potentially permanent hyposmia and anosmia and its efficacy is questioned.
Bradford Hill criteria have been used to determine causation when an association is observed between exposure to an environmental agent or a drug and a disease and includes strength of the association, consistency, specificity, temporality, dose-response, biological plausibility, biological coherence, experimental evidence, and analogy.
The investigators applied the criteria to the cases of 25 patients who presented to a nasal dysfunction clinic complaining of anosmia after they used the zinc gel nasal spray as well as assessing the literature on the relationship.
Based on the Bradford Hill criteria, they found that intranasal zinc gluconate therapy causes both hyposmia and anosmia.
http://www.medpagetoday.com/PrimaryCare/AlternativeMedicine/21249
Can Melatonin Help Rebuild Brittle Bones?
Melatonin, a hormone involved in regulating our internal body clock, may also help treat osteoporosis. Melatonin is now being studied in women over 45 as part of a clinical trial to test the benefits.
There are around 300,000 osteoporosis-related fractures each year. The condition affects both women and men of all ages, although it's most commonly associated with postmenopausal women.
Traditional treatment includes bisphosphonates, strontium ranelate, and vitamin D. In the new study at the University of Pittsburgh, researchers are looking at melatonin as an alternative treatment.
Previous studies have pointed to a connection between melatonin and osteoporosis. In one American study, women who worked nightshifts for more than 20 years were more likely to suffer wrist or hip fractures. Meanwhile, animal studies have shown melatonin in bone marrow. Increasing the amount of the hormone in animals with osteoporosis has encouraged bone growth. Melatonin also has a powerful antioxidant effect, so may help to prevent the inflammation and damage that leads to bone breakdown.
This might provide an inexpensive, efficient way to help some of the millions who have osteoporosis. However, much more work is needed before any benefits of melatonin can be assessed.
http://www.dailymail.co.uk/health/article-1296091/Could-sleeping-pill-help-rebuild-brittle-bones.html
House Probe Says China Never Investigated Tainted Heparin
The Chinese government never pursued an investigation into contaminated heparin sent to the U.S. in 2007 and 2008, despite repeated requests from the U.S. Two House Republicans said FDA officials recently told them that the agency has been "severely hampered" by the lack of cooperation from China in finding those responsible. Contamination in the widely used blood-thinner was linked to at least 81 deaths in the U.S. The probe by House Representatives comes as FDA Commissioner Margaret Hamburg prepares for her first trip to China since assuming her post last year.
"It is shocking to find out two years after Chinese-made heparin was killing Americans, the Chinese government still has done no investigating to find out why," said Mr. Barton, the top Republican on the House Energy and Commerce Committee. He has requested that Ms. Hamburg air the issue with Chinese officials, who claim they did do an investigation.
A spokeswoman for the FDA said "There are serious limitations on what the FDA can do to pursue civil and criminal investigations in foreign countries, especially without the cooperation of the foreign government." In a June 16 letter to the congressmen, the FDA wrote that it was "denied full access" to manufacturers of raw heparin in China.
http://online.wsj.com/article/SB10001424052748703954804575381540372921432.html?mod=dist_smartbrief
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