Hey mravg, I googled and not much showed up on just what the alcohol does! I did find folks opinions that mentioned the absorption and the sedating effects.
Anyway, was thinking just how we came up with the use of alcohol in the first place! It was a mixture, formula of a guy or two on another forum who gave us the original mixture for making the liq c, (remember the heating recipe?).
The alcohol is in my opinion is a good medium for the liquid tadalafil in that it does hinder bacterial growth if nothing else and ease of shaking up the suspenion vs oils or thick mediums.