Blend all the ingredients, except stearic acid and "Cab-O-Sil," for 15 min. Add the stearic acid and "Cab-O-Sil" and blend for an additional 10 min. Compress. Mean Tablet Wt. (n=20)---250 mg Mean Hardness---5 kg Friability---0.48% Disintegration Time (purified water)---2 min