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.

This dose-ranging study used the acute febrile sore throat model (oral temperature ≥38.0°C) to establish the lowest reliable antipyretic and analgesic dose of diclofenac potassium (6.25 ...