This section is from the book "Practical Materia Medica And Prescription Writing", by Oscar W. Bethea. Also available from Amazon: Practical Materia Medica and Prescription Writing.
(Not Official.)
Latin, Kaolinum
Eng., Kaolin.
A native Aluminum Silicate. A soft, white or yellowish-white powder, or in lumps.
Preparation (U. S. P., viii).
Eng., Cataplasm of Kaolin. Kaolin, 577 Gm.; Boric Acid, 45 Gm.; Thymol, 0.5 Gm.; Methyl Salicylate, 2 Gm.; Oil of Peppermint, 0.5 Gm.; Glycerin, 375 Gm.
Cataplasm of Kaolin is said to be emollient, local sedative, exosmotic, antiphlogistic.
1 Hughes: Practice of Medicine.
The Cataplasm is employed in the treatment of pleurisy, pneumonia, mastitis, sprains and deep-seated pain generally.
The official Cataplasm of Kaolin is still not stocked by many druggists or often prescribed, as the proprietary preparations have a rather strong hold on the profession. It should be applied direct to the skin over the part affected. It is used as hot as patient can tolerate, and is used in a layer from one-eighth to one-quarter inch in thickness. This is covered with a heavy layer of absorbent cotten. The application is usually changed every six to twelve hours.
 
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