Metronidazole tablets belong to a group . 2g as a single dose for 1 day or 250mg twice a day . 2g once a day for 3 days or 500mg twice a day for 7 to 10 . . 'what is the use of metronidazole 500mg' is that these tablets help block some of . 2g single dose or 1 g Flagyl 500mg tablets 1 twice a…