This section is from the book "A Text-Book Of Pharmacology, Therapeutics And Materia Medica", by T. Lauder Brunton. Also available from Amazon: A text-book of pharmacology, therapeutics and materia medica.
Uses. - They are employed where we wish to produce mercurial action without the risk of interfering with the digestion.
The compound ointment is used to cause absorption of effusion or thickening around joints in cases of disease or injury after the inflammation has subsided. It ought to be combined with pressure and rest.
Used for similar purposes as the plaster or ointment. It is more irritating than either, on account of the ammonia it contains.
It is said to cause salivation more readily than mercurial ointment, as the camphor and ammonia with which it is mixed assist its absorption.
Emplastrum Hydrargyri, B. and U.S.P. Mercurial Plaster.
Preparation. - Rub mercury with olive-oil, and sulphur B.P. or resin U.S.P., and add lead plaster to give it consistency. Sulphur and resin are used to extinguish the globules of mercury, i.e. make them so small as to be invisible.