Mostly used locally against excessive secretion of mucous membranes, to contract tissue and check hemorrhage. In Osmidrosis, corrects fetor of the perspiration. Obstinate nervous coughs. Hematuria. Obstinate constipation. Pain in abdomen, sensitive to pressure. Intestines can be felt like cylindrical enlargements. One-half per cent solution.

Relationship.--Gallic acid q. v.