Handbook of materia medica, pharmacy, and therapeutics, including the physiological action of drugs, the special therapeutics of disease, official and practical pharmacy, and minute directions for prescription writing / by Sam'l O.L. Potter.

  • Potter, Samuel O. L. (Samuel Otway Lewis), 1846-1914.
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: Handbook of materia medica, pharmacy, and therapeutics, including the physiological action of drugs, the special therapeutics of disease, official and practical pharmacy, and minute directions for prescription writing / by Sam'l O.L. Potter. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    83/846 (page 81)
    ACIDUM TANNICUM. 8r The Sulphites and Hyposulphites are partly decomposed by the acid of the stomach, sulphurous acid being given off, and the balance being converted into sulphates act as purgatives, and are absorbed, undergoing elimination as sulphates by the kidneys and bowels. They were formerly supposed to enter the blood and tissues as sulphites, and to arrest morbid processes of the zymotic character, but both these assump- tions have proven erroneous. The Sulphites were used in zymotic and septic fevers as internal antiseptics on theoretical grounds, but their sup- posed value has not been realized. ACIDUM TANNICUM, Tannic Acid, Gallotannic Acid, Digallic Acid, Tannifi, HC14H9O9,—is a solid body in light-yellowish scales, of strongly astringent taste and acid reaction, obtained ‘ from powdered galls (see Galla), by exposure for three days in a damp at- mosphere, then macerating with ether, pressing, and drying the liquid portion. It is soluble in i of water, in 0.6 of alcohol, at 59° F., and in about I of glycerin with moderate heat; very soluble in boiling water and in boiling alcohol, almost insoluble in ether, chloroform, benzol or benzin. Dose, gr. j-xx, in wafer, pill or capsule. Preparations. Unguentum Acidi Tannici, Ointment of Tannic Acid,—is a 20 per cent, ointment, made with Benzoinaied Lard. Trochisci Acidi Tannici, Troches of Tannic Acid,—each troche contains nearly one grain of Tannic Acid. Glyceritum Acidi Tannici, Glycerite of Tannic Acid,—strength l part in 4 of Glycerin. Suppositoria Acidi Tannici, Suppositories of Tannic Acid, (Unofficial),—have i part in 5 of Cacao Butter. Collodium Stypticum, Styptic Collodion,—has of Tannic Acid 20, Alcohol 5, Ether 25, Collodion to make 100 parts. Vegetable Astringents contain some form of tannic acid, as Quercitannic Acid irom Oak-bark, Rhatania-tannic Acid in Rhatany,t\c. (For list, see page 71.) The of- ficial acid is Gallo-tannic Acid, being that produced from Galls. * Antagonists and Incofnpatibles. Mineral acids, alkalies, persalts of iron, and salts of antimony, lead and silver, are chemically incompatible. Vegetable alkaloids and gelatin form insoluble precipitates with Tannic Acid. t Physiological Action and Therapeutics. Tannic Acid is a powerful astringent. It precipitates pepsin and co- agulates albumen, impairs digestion, stops peristalsis, and causes constipa- tion. A part of that taken into the stomach unites with the pepsin and albumen, while a part is converted into Gallic ,and Pyrogallic Acids, and in this form is both absorbed and excreted. It is a crystalloidalbody, but combines with colloids, and is a valuable antidote in poisoning by the alkaloids and tartar emetic, with which it forms tannates which are