Devrom® (200mg bismuth subgallate) is an FDA-approved, over the counter medication used to eliminate the odor associated with flatulence and bowel movements. Devrom has been a trusted name for over 50 years, and allows its users to manage flatulence odor. Parthenon, the company which produces Devrom, started in 1961 and continues to produce the popular internal deodorant today along with other medical products. What is Devrom used for? Devrom is used to manage odor from stool and flatulence.