Question
Posted on: April 8 2014When preparing Unguentum Haemo-nasal MFS creates a hard mass.
Unguentum Haemo-Nasale MFS
Composition: Hamamelis Fluib. extr. 600 mg; Phenazon, tannin AA 3g; Water 6g and Ung Simplex ad 30g
Dear
When preparing
Unguentum Haemo-Nasale MFS
Composition: Hamamelis Fluib. extr. 600 mg; Phenazon, tannin AA 3g; Water 6g and Ung Simplex ad 30g
Creates a hard mass that can no longer be rubbed.
How can I avoid this?
Answer
There seems to be an incompatibility between Phenazone (Antipyrine) and tannin in the presence of water. It seems best to make the tannins very finely and rub them in beforehand with some of the simple ointment. Dissolve antipyrine (still benefit?) in water and and emulsifying with a second part of the simple ointment. Mix both mixtures and add the Hamamelis to the last liquid extract.