Figure 4: Chromatogram of (a) a blank sample (plasma without drug or I.S),(b) a zero sample ( plasma spiked with 3 μg/ml IS,(c) non-zero sample (plasma spiked with 1 μg/ml drug and 3 μg/ml I.S), (d) plasma spiked with 1 μg/ml drug after acid degradation, 1μg/ml drug and 3 μg/ml I.S Where (A) is atomoxetine HCl, (F) is fluoxetine HCl.