Elmiron (pentosan polysulfate sodium) is a popular prescription drug that treats urinary pain caused by interstitial cystitis. It can also be used to treat osteoarthritis. The drug, Elmiron, is manufactured by Janssen Pharmaceuticals, a division of the healthcare giant Johnson & Johnson.
Elmiron is classified as a urinary analgesic, or pain reliever, and as an anticoagulant, or blood thinner.