Cassia Seed is the dried ripe seed of Cassia obtusifolia L. or Cassia tora L. (Fam. Leguminosae). It is Slightly rhomboidal-cuboid or shortly cylindrical, both ends pararell and oblique, 3~7 mm long, 2~4 mm wide. Texture hard and uneasily broken.
It is distributed to the eyes, Liver and Large Intestine Channels. Reducing liver-heat to brighten the eyes
It is indicated in bloodshot eyes with aversion of light and an overflow of light and an overflow of tears due to liver-heat or attack on the liver channel by wind-heat. For the treatment of syndrome of liver-heat, it may be combined with Spica Prunellae, Fructus Gardeniae; for syndrome of wind-heat, with Folium Mori, Flos Chrysanthemi. It is also used to treat advanced optic atrophy, internal oculopathy, blurred vision, eyes without luster; in these cases, it is often combined with Radix Rehmanniae, Fructus Lycii, Radix Scrophulariae, Rhizoma Dioscoreae, etc.
For the treatment of constipation due to the dryness of intestines, it can be used as a single medicine, or combined with Fructus Cannabis, Semen Pruni, etc. Besides, it is also often used to treat headache, as one of the symptoms of hypertension due to hyperactivity of liver-Yang, and it has got effects.