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13 May 2011

Treat snakebites with adrenaline

Giving adrenalin to people with snakebites helps prevent severe allergic reactions to antivenom treatment, new research finds.

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Giving adrenalin to people with snakebites helps prevent severe allergic reactions to antivenom treatment, new research finds.

There's a high rate of acute adverse reactions to antivenom, according to the study. But giving low-dose adrenaline to patients who have been bitten by a poisonous snake before administering antivenom reduces the risk of severe allergic reactions.

The study, conducted by researchers from the University of Kelaniya in Sri Lanka, involved more than 1,000 people hospitalised for snakebites. Patients were given low-dose adrenaline, promethazine, hydrocortisone or placebo immediately before treatment with antivenom. The treatments were administered alone and in all possible combinations.

Antivenom and snakebites

The study found that adrenaline reduced severe reactions to the antivenom by 43% at one hour and by 38% over 48 hours.

Patients given hydrocortisone or promethazine did not experience those same benefits.

The researchers noted the findings are significant given the fact that in countries where snakebites are a major health problem, acute allergic reactions to poor quality antivenoms are common and often fatal.

"The need for concerted action by local health and regulatory authorities, the World Health Organization, and other stakeholders, including technology transfer programmes between antivenom manufacturers, to improve the quality of antivenom can not be overemphasizsd," said the study's authors in a news release.

"Until these overdue improvements come about, we have shown that pretreatment with low-dose adrenaline is an effective and safe therapy to prevent acute reactions to antivenom."


(Copyright © 2010 HealthDay. All rights reserved.)

 
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