Guest guest Posted August 7, 2003 Report Share Posted August 7, 2003 Drugs In Our Drinking Water and Rivers Italian researchers went looking for therapeutic drugs in our drinking water and rivers and unfortunately found nearly every one that they tested for. They state that these drugs can contaminate the environment because of metabolic excretion, improper disposal, or industrial waste. There are thousands of tons of drugs that are used by people yearly to treat illnesses, to prevent unwanted pregnancy, or to face the stresses of modern life, as well as widespread reliance on drugs in animal farming (e.g., antibiotics as feed additives, hormones, etc.). Some of these substances are excreted unmetabolised or as active metabolites; they escape degradation in waste treatment plants and enter the environment. Improper disposal of expired medication and manufacturing facilities can also contribute to this contamination. Since pharmaceutical products can have long half-lives, they accumulate, reaching detectable and biologically active amounts. Several commonly used medicinal drugs, such as erythromycin, cyclophosphamide, naproxen, sulpha-methoxazole, or sulphasalazine, can persist in the environment for more than a year. Clofibric acid, the main metabolite of clofibrate, has an estimated persistence in the environment of 21 years and is still detectable in lakes and rivers even after its withdrawal from the market. Researchers specifically tested for popular medications which are excreted unmetabolised (not broken down), plus some previously found in the environment, as well as others commonly used as growth promoters in animals All drugs, with the exception of 2 were detected in river or drinking water or river sediments. Although the concentrations measured in the water may result in human exposure much lower than those producing a noticeable pharmacological effect, possible effects of long-term exposures have still not been determined. Lancet 2000; 355: 1789 - 1790 _______________ MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*. http://join.msn.com/?page=features/virus Quote Link to comment Share on other sites More sharing options...
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