blend add the inhredients, 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