Journal of analytical toxicology
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Case Reports
Concentrations of heroin, 06-monoacetylmorphine, and morphine in a lethal case following an oral heroin overdose.
A case of lethal overdose by heroin ingestion is presented. The concentrations of drugs were measured several hours after death. ⋯ Concentrations of heroin, 06-monoacetylmorphine, and morphine were 109, 168, and 1140 ng/mL, respectively, in blood and 17, 12, and 425 ng/g, respectively, in gastrointestinal content. In urine, however, only morphine was detected at 3650 ng/mL.
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A case involving a suicidal overdose resulting from the ingestion of colchicine tablets is presented. The drug was quantitated using liquid chromatography. The femoral blood level was 62 ng/mL, and the maximum concentration found in bile was 2921 ng/mL. Therefore, bile appears to be the sample of choice for toxicological analysis when a poisoning case involving colchicine is suspected.
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Comparative Study
Development and validation of a nonisotopic immunoassay for the detection of LSD in human urine.
A microplate enzyme immunoassay (EIA) for the detection of lysergic acid diethylamide (LSD) in human urine was developed. The assay kit is designed around an LSD derivative coated on the wall of microplate wells with preservatives and stabilizers. Sample and rabbit anti-LSD are added to the microplate well. ⋯ The EIA is suitable for the screening of urine samples for the presence of LSD. Preliminary indications are that the assay is also suitable for use with whole blood specimens. The assay can be performed manually or be fully automated and without the need for radioactivity; it can be used in any laboratory.
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Comparative Study Clinical Trial Controlled Clinical Trial
Human pharmacokinetics of intravenous, sublingual, and buccal buprenorphine.
Buprenorphine is a potent opioid analgesic used in the treatment of moderate to severe pain. At higher doses, it has demonstrated potential for treating heroin dependence. This study was undertaken to investigate buprenorphine pharmacokinetics by different routes of administration at dosages approximating those used in opioid-dependence studies. ⋯ The extended elimination half-lives may be due to a shallow depot effect involving sequestration of buprenorphine in the oral mucosa. Norbuprenorphine mean peak plasma concentrations were less than 1 ng/mL and were highly variable among different routes of administration and individuals. The terminal elimination half-life of norbuprenorphine was longer than buprenorphine.
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A sensitive method for simultaneous determination of ester-type local anesthetic drugs (procaine, tetracaine, and T-caine) has been developed using wide-bore capillary gas chromatography with nitrogen-phosphorus detection (GC-NPD). The extraction procedure, the experimental conditions for heptafluorobutyryl (HFB) derivative formation, and the percentage of the ester-type local anesthetic drugs from the human serum are described. ⋯ Recoveries from the human serum were 85-94%. This method could be used to determine concentrations as low as 24-28 ng/mliters of the ester-type local anesthetic drugs.