Formulation and evaluation of colon specific matrix tablet of metronidazole

Targeting of drug to the colon oral route the drug release is controlled by the gastrointestinal pH, transit times and intestinal flora. Metronidazole is only used antibiotics, which can be used, in colonic disease. Matrix formulations containing various proportions of Xanthan gum and HPMC E5LV were prepared by wet granulation technique using 10% starch paste. Six Matrix tablet formulation (1 to 6) of Metronidazole were prepared different mixture of Xanthan gum and HPMC-E5LV. All the formulations were evaluated for inprocess quality control tests. The in-vitro drug release study first in 0.1N HCl followed by in pH 7.4 phosphate buffer, the formulation F3 show good drug release in control manner. Hence, synthetic polymer such as HPMCE5LV is most cheap and suitable for colonic drug delivery.