viscous resin (gum) – Ammoniacum (also Gumrniresina Ammoniacum).
Botanical description. A powerful perennial herb that reaches a height of 2 m and develops a hollow stem 5 cm thick. All parts of the plant, even with minor damage, secrete white milky juice. It is found in the steppes and deserts of Iran, Afghanistan, and Central Asia.
Active ingredients: essential oil.
Application. Dorema gum used to be a part of cough remedies (and also in veterinary medicine), used as a diuretic, but mainly in the manufacture of patches.