Well, I don't have the condition and certainly hope I never do. But, I have noticed one older gentleman in church who does suffer from it - hand tremors.
Nice to know, I suppose, but I can't imagine him or anyone in these parts taking up T'ai chi or Reiki.
The more likely choice would be an herbal tincture from the root of the Valerian plant. It is found locally and throughout Appalachia.
Incidentally, herb is a French word and that's the way they and a lot of others pronounce it. The Brits added the hard "h" around the 18th century. That is how I always pronounced it - herb. I didn't know you pronounced it any other way until I strolled into an h"erbal" store in Denver some years back and had the hippy behind the counter correct me when I asked about some Herbs.
English, it can be a confusing language.