Potentially Unsafe Plants

Common Name--Botanical Name--Serious Adverse Effects
American mistletoe--Phoradendron flavecens--Hypertension, hypertensive crisis

American yew--Taxus canadensis--Cytotoxicity

Arnica--Arnica montana--Violent gastroenteritis, nervous disorder, muscle weakness, collapse

Autumn crocus--Colchicum autumnale--GI toxicity, vomiting, neurologic toxicity, renal failure

Belladonna--Atropa belladonna--Anticholinergic toxicity

Betel palm--Areca catechu--Teratogenesis

Bird�s foot trefoil--Lotus corniculatus--Cyanide poisoning: seizures, paralysis, coma, death

Bittersweet nightshade--Solanum dulcamara--Cardiac toxicity

Black nightshade--Solanum americanum--Cardiac toxicity

Black locust--Robina pseudo acacia--Bradycardia, nausea, vomiting, dizziness

Bloodroot--Sanquinaria canadensis--Destruction of tissue on application

Blue flag--Iris versicolor--Severe nausea, vomiting, diarrhea

Broom--Cytisus scoparius--GI toxicity or dehydration

Calabar bean--Physostigma venenosum--Cholinergic toxicity

Castor oil plant--Ricinus communis--GI toxicity or dehydration

Chaparral--Larrea trindentala--Fulminant hepatic failure

Comfrey--Symphytum officinale--Hepatotoxicity

Cotton--Gossypium hirsutum--Hypokalemia, male sterility, heart failure at high doses

Daffodil--Narcissus psuedonarcissus--CNS depression, carcinogenicity, coma, death

Ergot--Claviceps purpurae--Hallucinations, hypertension, tissue ischemia, acute infection of the skin involving lymphatic vessels

Foxglove--Digitalis purpurea--Bradycardia, heart block, arrhythmias

Germander--Teucrium scorodonia--Hepatotoxicity

Goldenseal--Hydrastis candensis--Hyperreflexia, hypertension, seizures, respiratory failure

Heliotrope--Heliotropium europaeum--Hepatotoxicity

Hedge mustard--Sisymbrium officinale--Cardiac toxicity, heart failure

Hemp dogbane--Apocynum cannabinum--Cardiac stimulant, arrhythmias

Henbane--Hyoscyamus niger--Anticholinergic toxicity

Horse chestnut--Aesculus hippocastanum--Bleeding

Indian pink--Spigelia marilandica--Death (from overdose)

Indian tobacco--Lobelia inflate--Paralysis, hypothermia, cardiovascular collapse, coma, death

Jalap root--Exagonium purga--Dramatic purgative cathartic

Jimsonweed--Daturia stramonium--Anticholinergic toxicity, hallucinations

Life root--Senecio longilobus--Hepatic failure from hepatic venoocclusive disease

Lily of the valley--Convallaria majalis--Cardiac toxicity

Marsh marigold--Caltha palustris--Inflammation of mucosal tissues and bronchospasm

Mayapple--Podophyllum peltatum--Severe GI irritation

Monkshood, Wolfsbane--Aconitum spp.--Cardiotoxicity, neurotoxicity, hypotension, arrhythmias

Moonseed --Menispermum canadense--Tachycardia, severe vomiting or diarrhea

Morning glory--Ipomoea purpurea--Potential for hallucinations, psychosis

Periwinkle--Vinca major, V. minor--Cytotoxicity, renal failure, hepatic failure, neurologic damage

Poison hemlock--Conicum maculatum--Birth defects

Queen�s delight--Stillingia sylvatica--GI toxicity, mutagenesis

Strychnine tree--Strychnos nuxvomica--CNS stimulation leading to seizures and cardiac arrest

Wallflower--Cheiranthus cheiri--Cardiac toxicity, heart failure, bradycardia

Wild cherry--Prunus virginiana--Dyspnea, vertigo, seizures

Wild licorice--Glycyrrhiza lepidota--Hypotension, hypernatremia, hypertension, muscle wekness

Wintercress--Barbarea vulgaris--Renal damage

Wormseed--Chenopodium ambrosioides--Seizures, paralysis

Wormwood--Artemisia absinthium--Rhabdomyolysis, renal failure, seizures, mental deterioration, optic neuritis

Yellow Jessamine--Gelsemium sempervirens--Paralysis, death

Herbal Agents listed as unsafe by the FDA
Common Name Botanical Name
American mistletoe Phoradendron flavescens
Arnica Arnica montana
Bittersweet nightshade Solanum dulcamara
Bloodroot Sanquinaria canadensis
Broom Cytisus scoparius
Deadly nightshade Atropa belladonna
Dutch tonka bean Dipteryx odorata
English tonka bean Dipteryx oppositifolia
European mistletoe Viscum album
Heliotrope Heliotropium europaeum
Horse chestnut Aesculus hippocastanum
Jimsonweed Datura stramonium
Lily of the valley Convallaria majalis
Lobelia Lobelia inflata
Madagascar periwinkle Catharanthus roseus
Mandrake Mandragora officinarum
Mayapple Podophyllum peltatum
Morning glory Ipomoea purpurea
Periwinkle Vinca rosea
Snakeroot Eupatorium spp.
Spindle tree Euonymus europaeus
St. John�s Wort Hypericum perforatum
Sweet flag Acorus calamus
True jalap Exagonium purga
Wahoo Euonymus atropurpureus
Wormwood Artemisia absinthium
Yohimbe Corynanthe yohimbe,Pausinystalia yohimbe


Taken from Professional�s Handbook of Complementary & Alternative Medicines by Charles W. Fetrow, PharmD and Juan R. Avila, PharmD, 1999.
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