Side Effects and Safety Concerns
As approved pharmaceuticals, the various chelating agents may cause specific side effects if used improperly. When protocols are followed, there is a low occurrence of side effects. DMPS injections may cause skin reactions at the injection site. Other side effects reported include fever, headache, nausea. No death has been linked to DMPS. The EDTAs when used according to protocol are equally safe. Most important is the correct use and a slow infusion time (1gr/hr or less of NaEDTA or CaEDTA). Side effects are largely avoided if general medical caution is exercised. Most importantly, renal function has to be checked before any chelation substance is used. 2007 research with lab rats indicates giving chelating agent DMSA to rats without high levels of lead may cause lasting cognitive damage. The German Environmental Agency (Umweltbundesamt)listed DMSA along with DMPS as the two most useful and safe chelating agents available at this time. Flora and Pachauri state 'Chelation treatment is the preferred medica treatment for reducing toxic effects of metals.'
Chelation therapy can be hazardous when used inappropriately. In August 2005, chelation therapy conducted by an ACAM member killed a 5-year-old boy with autism; a 3-year-old nonautistic girl died in February 2005, and a nonautistic adult died in August 2003. These deaths were due to cardiac arrest caused by hypocalcemia during chelation therapy. In two of the cases hypocalcemia appears to have been caused by the administration of Na2EDTA (Disodium EDTA) and in the third case the type of EDTA was unknown. Only the 3-year-old girl had been medically assessed and found to have an elevated blood lead level and resulting low iron levels and anemia, a proper medical cause for chelation therapy to be conducted. According to protocol, EDTA should not be used in the treatment of children. More than 30 deaths have been recorded in association with IV-administered disodium EDTA since the 1970s.
Read more about this topic: Chelation Therapy
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