Talking about dried herbal leaves with pharmaceutic effect can you call that an herbal drug?

There is nothing to say you can not refer to dried herbal leaves as herbal drugs, however, many herbal treatments (with pharmaceutical effect) are in the form of tinctures, infusions, poultices, oils, seeds, bark, and fresh leaves, flowers, and roots.

Also, most people use the Word "drug" to refer to a chemical preparation and "herbs" as a natural-pathic treatment.