I write about herbs as an MD, a gardener, and as a tea drinker who believes that there is a place for herbs in Medicine. Herbal remedies lay somewhere between food and drugs. The tea with toast that I had as an aid to recovery of colds as a child is a good example of this, although there may be better ones that come to the mind of people steeped in the lore pf medicinal plants. Edible wild plants of North America were gathered by Native Americans not only as part of their diet, along with game, but as medicines as well.
Herbs are plants, plants that have special properties for animals.
Catnip for kitties. Aloe vera for you and me. Myself, I see herbs as plants that have a little magic. Sometimes a truly intoxicating aroma, or a visible effect on the skin. Many herbs are both a food and a drug.