Method Gemifloxacin mesylate Theophylline Warfarin Omeprazole
Concentration (µg/ml) Recovery % CV % Concentration (µg/ml) Recovery % CV % Concentration (µg/ml) Recovery % CV % Concentration (µg/ml) Recovery % CV %
RP-HPLC 0.05 90.000 6.667 0.25 90.000 5.333 0.1 87.000 8.046 0.1 87.000 9.195
  0.15 92.000 5.797 0.75 92.667 5.899 0.3 91.333 7.664 0.3 88.333 9.811
  1 89.500 2.570 4 89.800 2.840 2 87.050 3.561 1 90.400 6.416
  5 86.720 4.935 7 90.829 6.055 9 92.911 4.329 4 88.150 3.318
TLC 0.1 88.000 6.818 0.5 86.400 7.176 0.2 87.000 4.598 0.1 91.000 7.692
  0.3 88.333 3.396 1.5 93.000 4.659 0.6 88.667 4.323 0.3 87.000 4.215
  1.5 90.133 2.663 3 91.500 3.716 1 89.600 5.134 0.8 92.625 4.318
  2.5 93.400 2.484 5 85.300 7.550 2 91.050 5.052 1.2 93.583 5.788
CV%: Coefficient of Variation %
Table 2: Results of recovery of gemifloxacin, theophylline, warfarin and omeprazole in human plasma.