Diclofenac potassium is a phenylacetic acid NSAID with a faster onset of PAR than the standard formulation, diclofenac sodium. [17] It is used in many countries for treatment of acute pain ...

Diclofenac potassium was well tolerated ... It belongs to the phenylacetic acid class, of which diclofenac sodium (Voltaren®, an enteric-coated tablet) was first marketed in Japan in 1974.