Herb Pharm Prickly Ash Liquid Herbal Extract Description. Liquid Herbal Extract. Zanthoxylum Clava-Herculis. Autumn-Harvested Bark. We prepare our Prickly Ash Extract from the bark of Zanthoxylum clava-herculis trees which are Custom Wildcrafted in their natural wild habitat. To assure optimal extraction of Prickly Ashs bioactive compounds the bark is hand-harvested only in the autumn is carefully shade-dried and is then thoroughly extracted. Our Prickly Ash is not fumigated or irradiated. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose treat cure or prevent any disease. Shake well before using. Two to four times per day take 30 to 40 drops in a little water. Ingredients: Certified organic grain alcohol distilled water and prickly ash extractives.