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.
Some forms, especially of dry spasmodic asthma, are much relieved by repeated small doses. Dr. Ringer has noted their value in attacks of wheezing and orthopnoea of asthmatic character to which some children are subject after exposure to cold, and which sometime follow measles. In such cases he recommends one teaspoonful every quarter-hour of a solution containing only 1 gr. in 1/2 pint of water: even this amount may cause vomiting, though that effect is not necessary for relief. Dr. Koch has remarked that the remedy is most useful when the attacks are brought on by peripheral irritation (cold, etc.), rather than by emotional causes; and he speaks highly of a combination with arsenic acid- the arseniate of antimony - which he administers in the form of vapor from a cigarette (Practitioner, vol. iv.).