Avoid these oral supplements: Arbor vitae, Beth root, Black cohosh, Blue cohosh, Cascara, Chaste tree berry, Chinese angelica (Dong Quai), Cinchona, Cotton root bark, Feverfew, Ginseng, Golden seal, Juniper, Kava kava, Licorice, Meadow saffron, Pennyroyal, Poke root, Rue, Sage, St. John's wort, Senna, Tansy, White peony, Wormwood, Yarrow, Yellow dock, vitamin A (large doses can cause birth defects).