This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
There is a peculiar form of difficulty in swallowing liquids, which I have seen only in children; they drink readily, but the fluid either returns at once from the mouth or partly chokes them, or they remain, with open mouth, gradually swallowing small quantities with continued muscular spasm. No definite cause can be assigned. The symptoms come on a few months after birth, and I have seen it mostly among the children of the poor. It may be relieved by bromide, and Dr. Ringer has remarked that a similar condition, when congenital, is much benefited by bromide of potassium.
The dysphagia of phthisis, connected with local irritation and inflammation, is also relieved by the salt, which should be swallowed slowly and well diluted with mucilage.