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  • Title: Rapid high-performance liquid chromatographic determination of serum gabapentin.
    Author: Jiang Q, Li S.
    Journal: J Chromatogr B Biomed Sci Appl; 1999 Apr 30; 727(1-2):119-23. PubMed ID: 10360430.
    Abstract:
    Gabapentin (GBP) is a new antiepileptic drug approved for clinical treatment of partial seizures in the USA. Serum GBP concentrations in 283 patients were studied using high-performance liquid chromatography with fluorescence detection. The standard curves were linear over a range of 60 ng to 15 microg/ml. The coefficient of variations were 3.4 to 8.8% and 1.4 to 9.8% for intra- and inter-assay studies, respectively. The lower limit of quantitation was 10 ng/ml. Of the 283 patients studied, 72.5% had GBP levels between 2 and 10 microg/ml, 14.8% were below 2 microg/ml and 12.7% above 10 microg/ml. The mean+/-S.E. of GBP in 283 patients was 5.38+/-0.23 microg/ml. Peak concentrations of more than 15 microg/ml and trough levels as low as 0.1 microg/ml were not uncommon. The method described was rapid, simple, highly sensitive and reproducible. Other antiepileptic drugs and endogenous compounds did not interfere with the assay.
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