I ask this question because while cooking rhubarb, I thought waste not, want not, and decided to chuck the left over liquid into a container and add a bit of yeast to see what I ended up with.
I managed to get a quite nice, and really light wine, but due to a shortage of bottles had to fill up a large jar with a tap on it. I figured I had better quickly drink the jar to ensure it didn't spend too long exposed to any air the jar took in. The result was that I discovered that rhubarb wine can definitely act medicinally if the ailment involves not being able to make as much use of the bathroom as you would really like.
Since then I have looked into the medicinal benefits of elderberry wine as I have quite a lot of that around here. I read that amongst other things it can help loosen up congestion and help a person breathe better. After a couple of glasses, and armed with this knowledge I can definitely state that this appears to be the case. The air seems much more fluid at the moment. Quite nice considering my house can get a bit stuffy at times.
I was wondering if other people had tried using different ingredients to obtain medicinal effects, and which type of ingredients have which kind of effects. I think I could justify this part of my life a lot better if I can tell people I am just advancing the field of medicine. ;)