PubMed · 8507243
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R Lane. 1993-01-23. Managing depression in general practice.. https://doi.org/10.1136/bmj.306.6872.272-a
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A high-performance liquid chromatographic screening method (HPLC) is described for the determination of seven selective serotonin reuptake inhibitors (SSRIs) (fluvoxamine, milnacipran, paroxetine, sertraline, fluoxetine, citalopram, venlafaxine) and for three pharmacologically active N-demethylated metabolites (desmethylcitalopram, didesmethylcitalopram and norfluoxetine). A tricyclic antidepressant, clomipramine, was used as an internal standard. The method consists of liquid extraction of serum after alcalinisation at pH 9.50, followed by chromatography on a Beckman C18 reversed-phase column. Compounds were detected at 200.4 nm. The standard curves were linear over a working range of 50-1,000 ng/ml for fluvoxamine, 15-1,000 ng/ml for fluoxetine, 25-500 ng/ml for norfluoxetine, 50-500 ng/ml for sertraline, 20-500 ng/ml for paroxetine, 25-550 ng/ml for citalopram, 25-750 ng/ml for desmethylcitalopram, 25-800 ng/ml for didesmethylcitalopram, 25-650 ng/ml for milnacipran, and 25-500 ng/ml for venlafaxine. The quantitation limits of the method were 15 ng/ml for fluoxetine, 20 ng/ml for paroxetine, 25 ng/ml for venlafaxine, norfluoxetine and citalopram, and its metabolites, 40 ng/ml for sertraline and 50 ng/ml for fluvoxamine. No interferences were noted with this sensitive and specific method which can be used for therapeutic drug monitoring.
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