What Pill Company Is Rb

Metformin 500 Pill Markings

I have been taking Metformin for several years now, small round pill 3/8" diameter, one side says MF W/Line Underscore in middle of pill, then the number 1 underneath. The other side has a large letter G. My last prescription is larger round pill 1/2" in diameter, one side says RBX with a line through centre of pill, the other side says R12. The larger pill is considerably harder to swallow. What's the story here? ## The tablet with the RBX R12 marking also contains 500mgs of Metformin, it has just been manufactured by a different company, in this case Ranbaxy pharmaceuticals. The size difference is probably due to their using different inactive ingredients. Is there anything else I can help with?

1 REPLY Filed under Metformin