Surveys in a number of European and American populations have found the frequency of occurrence of the heterozygotes for the gene for the dibucaine-resistant variant of cholinesterase (E.C.3.1.1.8) to be relatively constant. Similar surveys in Oriental population have shown low incidence of the same gene. This study done on the multi-racial population consisting of 3 major groups shows an absence of the gene for the dibucaine resistant variant of cholinesterase. This is supported by the clinical experience in the use of suxamethonium as a single dose in more than 25,000 individuals.
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