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.
Latin, Sinapis Alba
Eng., White Mustard. Synonym, Yellow Mustard. The seed of Sinapis alba.
Emetic, 2 1/2 drachms (10 Gm.).
Emetic, rubefacient, vesicant.
Extensively used in the form of poultices, plasters, etc., in the treatment of pleurisy, bronchitis, pneumonia, and as a counterirritant for deep-seated pain generally. In the powdered form it is a prompt and safe emetic.
As an emetic a tablespoonful of powdered mustard is given in a glass of warm water. As a counterirritant, a satisfactory formula is one heaping tablespoonful of powdered mustard to eight of flour and the white of one egg and hot water.
It is applied hot and allowed to remain until the desired redness has been induced.
 
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