We describe a liquid-chromatographic method involving a new, nonsilica column (XAD-2, Hamilton Co.) for pentobarbital in plasma. Plasma is extracted with chloroform after addition of the internal standard, 5-ethyl-5-p-tolyl-barbituric acid. Acidic drugs are back-extracted into alkali, then chromatographed on the resin-base reversed-phase column. The use of alkaline mobile phase allows enhanced ...

We describe a method for determination of barbiturates, amphetamines, opiates, and methadone by the “enzyme multiplied immunoassay technique” (EMIT) applied to the centrifugal analyzer. This method gives results that agree well (92% for barbiturates, 97% for opiates, 94% for methadone, and 96% for amphetamines) with those obtained by the same technique with the SyvaGilford EMIT instrumentation,...

Wide individual variations in response to drugs is a common clinical problem, and is especially evident with coumarin anticoagulant therapy (1-3). A possible contributing factor to such variations could be the influence of another presumably unrelated drug upon the response to the coumarin anticoagulant. Reports from several laboratories (4-7) indicate that barbiturates can reduce the prothromb...

Results 23 year old woman suffered cardiac arrest due to a combined drug overdose with high doses of barbiturates, benzodiazepines and opioids. The patient was found unconscious and after 8 minutes of successful resuscitation transferred to the ICU where she rapidly developed multi organ failure due to the hypoxia and hypo perfusion during the time of cardiac arrest. The organ failure included ...

A fluorescence polarization immunoassay for barbiturates on the Abbott AxSYM analyzer is described. The assay displayed dilution linearity up to 1200 ng/mL; coefficients of variation varied from 5.96 to 8.61%; recovery varied from 94.9 to 105.3%; and sensitivity was less than 40 ng/mL. Good correlation between the standard six- and factory two-point calibration methods was observed. The Immunoa...