Formulation DAB (110 mg) MET (400 mg) AM  ±  SD % Assay AM  ±  SD % Assay Bulk drug 110.5 ± 0.043 100.45 400.2 ± 0.027 100.05 Marketed Formulation 111.0  ±  0.11 100.9 396.2 ± 0.097 99.05 Self -punched tablets 110.9  ±  0.08 100.81 399.6 ± 0.105 99.90

Table 5: Comparison of assay values of marketed formulations with bulk drugs and self punched tablets.