Ammoniacum
a gum resin, called also gum ammoniac, which is imported into this country from Turkey and the East Indies in little lumps, or tears, of a strong and not very pleasing smell and a nauseous taste, followed by bitterness in the mouth. It is a stimulant, a deobstruent, an expectorant, an antispasmodic, a discutient, and a resolvent. Hence, it is internally employed in asthma and chronic catarrh, visceral obstructions, and obstinate colic, while it is used externally in scirrhous tumors and white swellings of the joints.