Research Article

Development and Validation of Discriminative Dissolution Method for Metformin Immediate-Release Film-Coated Tablets

Table 1

Results from the solubility test of metformin HCL in the proposed dissolution media.

pH 1.2 (HCl and NaCl)Acetate buffer pH 4.5Phosphate buffer pH 6.8

Solubility of metformin HCL (n = 2)144.16 mg/mL165.96 mg/mL170.58 mg/mL

Calculated from 1000 mg/250 mL × 3 = 12 mg/mL.