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  • Title: Severe adverse reactions to dental local anaesthetics: systemic reactions.
    Author: Sambrook PJ, Smith W, Elijah J, Goss AN.
    Journal: Aust Dent J; 2011 Jun; 56(2):148-53; quiz 234. PubMed ID: 21623805.
    Abstract:
    BACKGROUND: Occasionally, patients suffer systemic adverse effects from injections of local anaesthetic solutions. This may range from minor transient vasovagal attacks to life-threatening collapse. METHODS: The suspected adverse reactions reported to the Office of Product Review of the Therapeutic Goods Administration (TGA) were analysed in detail. RESULTS: There was a high incidence (70%) of adverse reactions associated with prilocaine, which is much greater than its market share (less than 20%). There is a tendency to consider all systemic adverse reactions as being 'allergic' reactions although this is rarely the case. Syncope, cardiovascular and central nervous system reactions are much more common. There is also a risk of methaemoglobinaemia to prilocaine and articaine. A small series of cases referred to one of the authors were also reported. CONCLUSIONS: Recommendations are made as to the prevention, acute care and subsequent investigation of adverse reactions. The most important conclusion is not to just label the response as allergic and to use an alternative agent. Detailed investigation and reporting should be made for all cases of suspected severe adverse reaction to local anaesthetic agents.
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