This section is from the book "A Practitioner's Handbook Of Materia Medica And Therapeutics", by Thos. S. Blair. Also available from Amazon: A Practitioner's handbook of Materia Medica and Therapeutics.
Ammonium Chloride. In large doses (20 to 30 gr.) it has been advocated by Anstie, Ringer, and others in the treatment of neuralgia of a rheumatic or malarial type. Its administration must be pushed. In moderate doses (10 to 15 gr.) it is highly recommended in jaundice from catarrh of the bile ducts, since it increases and liquifies secretions. Catarrhs of all kinds are amenable to its influence, the dose depending upon the amount and character of the exudate.
In small doses (I to 5 gr.) it is a valuable stimulating expectorant, combining well with other substances, and so well known as to demand no extended comment.