Huamei Du

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A recent literature study has shown that after 3 days of use of a transdermic patch of fentanyl (Durogésic(R)), there was such an amount of drug remaining that may make its excessive use possible. First of all, we have developed a fentanyl assay by a spectrophotometric method and then, the remaining amount of fentanyl was determined in 29 used patches. This(More)
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