4DICLOFENACDiclofenac, sold under the trade names Voltaren among others, is a nonsteroidal anti-inflammatory drug used to treat pain and inflammatory diseases such as gout. It is taken by mouth or applied to the skin. Improvements in pain typically occur within half an hour and last for as much as eight hours.IUPAC ID: 2- 2-(2,6-dichloroanilino)phenyl]acetic acidFormula: C14H11Cl2NO2Molar mass: 296.148 g/molCAS ID: 15307-86-5PubChem CID: 3033Trade names: Cataflam, Voltaren, see trade names, Cataflam, Voltaren.