Dur Syrup of Ammoniacum.
Take gum Ammoniacum, not strain'd, half an ounce; dissolve it in Water 1 ounce; strain, and join it according to Art, with white Syrup 11 ounces.
It powerfully incides, attenuates, deterges, and expectorates. It helps very much in inveterate Maladies that owe their original to thick tough Phlegm, in a laborious straining Cough, Empyema; yea, and in a Peripneumonia and Pleurisie, when the fury of the Inflammation is past.
Thomas Fuller
Pharmacopeia Extemporanea 1710