DEVROM® effectively treats embarassing malodor from flatulence (gas) and stool. FDA approved and available without a prescription. A trusted product for over 40 years. Devrom is an internal deodorant that safely and effectively deodorizes embarrassing flatulence and stool odor. Capsules for oral use. Bismuth subgallate formula provides immediate odor control from ostomies and fecal incontinence.