The present invention concerns novel benzenesulphonamide compounds, defined by formula I. ##STR00001## Therapeutic compositions comprising the benzenesulphonamide compounds of the invention or salts thereof and methods for producing the benzenesulphonamide compounds of the invention are also disclosed. The benzenesulphonamide compounds of the invention or salts thereof are useful for treating pain, such as hyperalgesia and major algesia.