Tannic acid. C14H10O9,2H2O. [There are two forms of tannic acid, Gallo-tannic acid, derived from nut-galls, and Querci-tannic acid, derived from healthy leaves and bark of the oak. The former is the most used.] Trituration. Solution in rectified spirit.
Characteristics.-Tannin or Tannic acid, of which Gallic acid (C7H6O5) is a derivative, has produced effects on healthy persons, and on several taking it for diarrhoea. The chief effects were the production of a state of leathery dryness of mouth and intestinal canal; a condition like ileus; and a very aggravated state of constipation.
Relations.-Compare: Querc., Gall. ac., Op., Pb.
8. Mouth.-Tongue white, dry.-Leathery dryness of mucous membrane of mouth and intestinal canal.
11. Stomach.-Loss of appetite.-Thirst.-Vomiting.-Obstinate vomiting of bilious substances.-Painful sensation in epigastric region and abdomen.-Violent pains in stomach.
12. Abdomen.-The intestines could be felt like cylindrical enlargements through walls of abdomen.-Ileus.-Colic.-Abdomen: distended; sensitive to pressure but not distended.
13. Stool.-Painless and bloody discharge from bowels.-Obstinate constipation; lasted eight days; only dissipated on the ninth day by two drops of Croton oil.-Foul stools.
14. Urinary Organs.-Urine scanty, dark-coloured.
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