The Commission E Monographs Approved Herbs with Similar Contraindications as Gentian root Ulcers, Gastric and Duodenal Cola nut Devil's Claw root F.C.  of Angelica root, Gentian root, and Bitter Orange peel F.C.  of Angelica root, Gentian root, and Fennel F.C.  of Angelica root, Gentian root, Wormwood, and Peppermint oil F.C.  of Ginger root, Gentian root, and Wormwood Horseradish Indian snakeroot Nasturtium Rhubarb root Watercress