Five weeks following AOM treatment, rats were fed with experimental diet programs containing aspirin at 700 and 1,400 ppm and naproxen at 200 and 400 ppm (continuously or intermittent dosing: seven days on/1 week away; or three weeks on/ three weeks off) and an individual dosage of 2,800 ppm aspirin intermittent dosing (three weeks on/ three weeks off)

Five weeks following AOM treatment, rats were fed with experimental diet programs containing aspirin at 700 and 1,400 ppm and…