Some uses are dismissed as ineffective. Others are discussed at length. Contraindications and possible side effects are carefully noted. There are numerous Reference Notes. Herbal preparations in this country are completely unregulated and no manufacturing standards are enforced.
Many products are merely worthless, but some are dangerous.
These two books are excellent guides. There are innumerable herbal concoctions on sale that are not mentioned in these books. No one should ingest them. My only criticism is the dismissal, in both books, of homeopathic remedies as mere placebos. Many recent scientific studies have shown these preparations can be effective medications.