Manage flatulence odor with Devrom (bismuth subgallate) Flatulence! Everyone has it, some people are too embarrassed to talk about it while others are too comfortable talking about it! Joked about as a silly bodily function, but for some people it can be socially debilitating. Perhaps the most embarrassing thing is the odor. Devrom is an FDA approved over-the-counter medicine that safely and effectively deodorizes stinky gas.Flatulence affects everyone but, the odor can be managed with Devrom.