SPL Set ID: 609c5344-9c97-4fa8-ad53-d0f622ce64ec

Diclofenac sodium topical solution USP, 2% w/w, contains diclofenac sodium, a benzeneacetic acid derivative that is a nonsteroidal anti-inflammatory drug, and is available as a clear, colorless to faintly pink or orange solution for topical application. The chemical name is 2-[(2,6-dichlorophenyl)amino]-benzeneacetic acid, monosodium salt. The molecular weight is 318.14. Its molecular formula is C 14 H 10 Cl 2 NNaO 2 and it has the following chemical structure. Each 1 gram of solution contains 20 mg of diclofenac sodium USP. The inactive ingredients: dimethyl sulfoxide (DMSO, 45.5% w/w), dehydrated alcohol, hydroxypropyl cellulose, propylene glycol and purified water. Figure 1