Appendix B Toxic or potentially toxic herbs
These herbs should not be taken during pregnancy and lactation and are generally not recommended for internal use under any circumstances, the last point with a few exceptions, specifically Convallaria, Lobelia, boldo, poke root, Rauwolfia and Gelsemium.
| Abrus precatorius seed and root | jequirity |
| Aconitum species | aconite |
| Acorus calamus | sweet flag |
| Adonis vernalis | |
| Ammi visnaga | |
| Apocynum | |
| Aristolochia (all or any species) | snakeroot, birthwort |
| Arnica (all or any species), other than for external use | Arnica |
| Arum maculatum | cuckoopint, lords and ladies |
| Belladonna | deadly nightshade |
| Brugmansia | |
| Brunfelsia uniflora | manaca, mercury |
| Calotropis | |
| Catha edulis | khat |
| Chenopodium ambrosioides | wormseed oil |
| Cicuta virosa | cowbane |
| Cinchona | quinine bark |
| Colchicum | |
| Convallaria | lily of the valley |
| Coronilla | |
| Crotalaria (all or any species) | |
| Croton (all or any species) | cascarilla, Croton |
| Cynoglossum officinale | hound’s tongue |
| Daphne mezereum | mezereum |
| Datura | jimson weed |
| Digitalis | foxgloves |
| Dryopteris filix-mas | male fern |
| Duboisia | |
| Echium vulgare | viper’s bugloss |
| Erysimum | |
| Euonymus europaeus | European spindle tree |
| Galanthus | snowdrop |
| Gelsemium | |
| Heliotropium (all or any species) | heliotrope |
| Helleborus (all or any species) | hellebore |
| Hyoscyamus | henbane |
| Lantana camara | Lantana |
| Lathyrus sativus, other than the cooked seed | grass pea |
| Lithospermum (all or any species) | |
| Lobelia | |
| Mandragora | mandrake |
| Menispermum canadense | yellow parilla |
| Mentha pulegium | pennyroyal |
| Oleander | |
| Opuntia cylindrica | San Pedro cactus |
| Papaver somniferum | opium poppy |
| Peganum harmala | wild rue |
| Petasites (all or any species) | butterbur |
| Peumus boldus | boldo |
| Phytolacca decandra (P. americana) | poke root, pokeweed |
| Podophyllum resin | |
| Pteridium aquilinum | bracken fern |
| Rauwolfia | |
| Ricinus communis, other than the fixed oil of the seed | castor tree |
| Robinia pseudoacacia, other than the leaf and flower | false acacia |
| Schoenocaulon officinale (Sabadilla officinarum, Veratrum officinale) | Sabadilla |
| Scopolia carniolica | |
| Semecarpus anacardium (Anacardium orientale), other than the seed | marking nut tree |
| Senecio (all or any species) | |
| Solanum (all or any species) except stems of Solanum dulcamara (bittersweet) and potatoes | |
| Sophora secundiflora | mescal bean |
| Spigelia marilandica | pink root, worm grass |
| Staphisagria | |
| Strophanthus | |
| Strychnos | nux vomica |
| Strychnos gaulthieriana | |
| Strychnos ignatii (Ignatia amara) | Ignatious bean |
| Symphytum (all or any species) | comfrey |
| Tamus communis fruit and root | black bryony |
| Tanacetum vulgare (except in preparations containing 0.8% or less of oil of tansy) | tansy |
| Teucrium (all or any species) | germander |
| Thevetia | |
| Toxicodendron radicans (Rhus toxicodendron) | poison ivy |
| Tussilago farfara | coltsfoot |
| Virola sebifera | cuajo negro, camaticaro |
| Yohimbe (yohimbine) |