Blend all the ingredients, except the magnesium stearate and "Cab-O-Sil," for 15 min. Add the magnesium stearate and "Cab-O-Sil" to the mixture and blend for an additional 10 min. Compress. Mean Tablet Wt. (n=20)---185 mg Mean Hardness---7.5 kg Friability---0.33% Disintegration Time (purified water)---1 min