I have been looking at the fixing of plant medicines in alcohol .I have some initial thoughts regarding possible menstruum .
Firstly fixing fresh herbs with water gives a limited shelf life, very limited in fact , one would suggest dispensation within a couple of weeks of mixing.
Alcoholic tinctures allow storage and transport , and indeed they mature in the manner of wine. We know the Romans used wine as a medium for various medications, horehound as a cough syrup being a well known example.A year old tincture is likely to be more potent than a new one.So amphorae of such a mix (as found in midland Britain ) solve problems of both distribution in bulk and maintenance of quality.
Now, wines such as medeira and sherry can be used as a makeshift modern bases, but a low alcohol content is not appropriate for dense materials, though some herbs respond to most wine -yarrow is a good example
http://www.unrv.com/forum/index.php?act=mo...=si&img=217 of one such "sympathetic" herb.
Some medicinal gums , myrrh is a good example, need a very high percentage of alcohol (90%) to be effective.
trickier mixes
I think what I shall now do is make a blog to give a ( fairly) harmless "roman style medicine" which wil be acessible for all to experiment with at home, perhaps a mild digestive aid using rosemary and lavender . The experiment is to show the stability of such a mix to people having a ready supply of reasonable quality wine (or just acetum).