Patent ID: 8563613

Claim:
A topical formulation comprising: (i) 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, or 5.0% w/w and all fractions in between, diclofenac sodium; (ii) 30-60% w/w DMSO; (iii) 1-15% w/w propylene glycol; (iv) 1-30% w/w ethanol; (v) optionally glycerine; (vi) water; (vii) at least one thickening agent selected from the group consisting of a cellulose polymer, a carbomer polymer, a carbomer derivative, a cellulose derivative, and mixtures thereof; wherein the topical formulation has a viscosity of 500-5000 centipoise; and wherein the formulation degrades by less than 1% over 6 months.