By 2003-2004, the population-adjusted rates for non-Hispanic Blacks and Hispanics were similar, and remained so through 2007-2008. However, over the 12-year time-frame examined, the rates for both minority groups were, in each 2-year interval, far less than that observed in non-Hispanic Whites. Disparities remain by ethnicity/race in the diagnosis and treatment of depression in the US.
Our study documents that 1.8% (1,319,763/73,860,558) of patients in 2007-2008 were prescribed triptan, and SSRI or SNRI (vs 1.3% in 2003-04, an increase of 38.5%). While this is a small fraction overall, the actual number of patients on a nationwide basis is substantial. What remains missing from the literature is documentation as to the number of cases of serotonin syndrome and resulting consequences (clinical and economic) because of the concomitant use of triptan, and SSRI or SNRI in the time-frame 2007-2008. Absent in these data, it remains difficult to assess the risk benefit associated with the use of triptan, and SSRI or SNRI.
Data from the US National Ambulatory Medical Care Survey (NAMCS) for the years 1991 through 2008 were used for this analysis. 23 The US NAMCS is a national probability sample designed and conducted by the US National Center for Health Statistics (NCHS) of the US Centers for Disease Control and Prevention. Data are collected by the US Bureau of the Census. The study is cross-sectional in design. The 3-stage probability sampling procedure, sampling variation, and estimation procedures for the US NAMCS have been described in detail elsewhere. 24 The basic sampling unit is the OBV.
A method for analysis of lacosamide [(R)-2-acetamido-N-benzyl-3-methoxypropionamide] is needed for both human and veterinary pharmacokinetic investigations. While lacosamide is currently used to manage partial-onset seizures in humans suffering from epilepsy, it is also presently being investigated for use in the treatment of canine epilepsy in veterinary medicine. Currently, no dosing regimen for the drug exists in dogs. A novel and simple high-performance liquid chromatography method was developed for determination of lacosamide in dog serum. Serum proteins (0.1 mL) were precipitated with -20.0°C acetonitrile after addition of the internal standard, daidzein. Separation was achieved with a Phenomenex® Luna® C₁₈ (2) (5 µm, 250 × 4.60 mm) column with ultraviolet detection at 210 nm. The calibration curves were linear ranging from 0.5 to 25 µg/mL. Precision of the assay was <13% (RSD) and was within 12% for all points in the calibration curve. The limit of quantitation for this method was 0.5 µg/mL. The assay was applied successfully to a pre-clinical study of lacosamide pharmacokinetics in dogs.
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