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Herbal Therapy
Selected Herb-Drug Interactions
Herbal Ingredient Common Name | Documented Drug Interaction | Potential Drug Interaction |
---|---|---|
Alfalfa (Medicago sativa) | AnticoagulantsOral contraceptives(⇓ Drug effect) | |
Angelica root (Angelica sp) | warfarin ⇑ Drug effect | |
Arnica flower (Arnica montana) | warfarin ⇑ Drug effect | |
Astragalus (Astragalus membranaceus) | cyclophosphamide ⇓ Drug effect | |
Betel nut (Areca catechu) | fluphenazine ⇑ Drug toxicity | |
Bilberry (Vaccinium myrtillus) | Anticoagulants ⇑ Drug effect Antidiabetics ⇑ Drug effect | |
Black cohosh (Cimicifuga racemosa) | Antihypertensives ⇑ Drug effect digoxin ⇑ Drug absorption Iron salts ⇓ Drug absorption | |
Bladderwrack (Fucus vesiculosus) | lithium ⇑ Drug effect thyroxine ⇑ Drug effect | |
Boldo (Peumus boldus) | warfarin ⇑ Drug effect | |
Cascara (Rhamnus purshiana) | Corticosteroids ⇑ Hypokalemia digoxin ⇑ Drug effect | |
Cat's claw (Uncaria tomentosa) | cyclosporine ⇑ Drug effect Protease inhibitors ⇑ Drug effect | |
Cayenne (Capsicum annuum) | theophylline ⇑ Drug absorption | Antiplatelets ⇑ Drug effect |
Chamomile (Matricaria chamomilla) | Sedatives ⇑ Drug effect simvastatin ⇑ Drug effect warfarin ⇑ Drug effect | |
Chasteberry (Vitex agnus-castus) | Prolactin inhibitors ⇑ Drug effect | |
Cocoa (Theobroma cacao) | Antidiabetics ⇓ Drug effect | |
Cranberry (Vaccinium macrocarpon) | warfarin ⇑ Drug effect | |
Dandelion (Taraxacum officinale) | Antidiabetics ⇑ Drug effect Diuretics ⇑ Drug effect lithium ⇑ Drug levels | |
Danshen (Salvia bowelyana; Saliva miltorrhiza) | warfarin ⇑ Drug effect | Antiplatelets ⇑ Drug effect |
Devil's claw (Harpago-phytum procumbens) | warfarin ⇑ Drug effect | Antiplatelets ⇑ Drug effect |
Dong quai (Angelica sinensis) | warfarin ⇑ Drug effect | Antiplatelets ⇑ Drug effect |
Echinacea (Echinacea spp.) | Immunomodulators Altered drug effect Protease inhibitors ⇑ Drug effect | |
Elder (Sambucus nigra) | Antidiabetics ⇑ Drug effect | |
Evening primrose (Oenothera biennis) | Anticoagulants ⇑ Drug effect Antiplatelets ⇑ Drug effect phenothiazines ⇑ Seizure risk | |
Fennel (Foeniculum vulgare) | fluoroquinolones ⇓ Drug absorption | |
Fenugreek (Trigonella sp.) | warfarin ⇑ Drug effect | Iron ⇓ Drug absorption |
Feverfew (Tanacetum parthenium) | Antiplatelets ⇑ Drug effect | |
Flaxseed (Linum usitatissium) | warfarin ⇑ Drug effect | |
Garcinia (Garcinia cambogia) | warfarin ⇓ Drug effect | |
Garlic (Allium sativum) | Protease inhibitors ⇓ Drug levels warfarin ⇑ Drug effect | Anticoagulants ⇑ Drug effect Antidiabetics ⇑ Drug effect Antiplatelets ⇑ Drug effect cyclosporine ⇑ Drug effect Non-nucleoside RTIs ⇑ Drug effect |
Ginger (Zingiber officinale) | phenprocoumon ⇑ Bleeding risk | Anticoagulants ⇑ Drug effect Antiplatelets ⇑ Drug effect |
Ginkgo (Ginkgo biloba) | trazodone ⇑ Drug effect Antiplatelet agents ⇑ Bleeding risk nifedipine ⇑ Drug effect omeprazole ⇑ Drug effect | Anticoagulants ⇑ Drug effect Antiepileptics ⇓ Drug effect cyclosporine ⇓ Drug absorption Ca++ channel blockers ⇓ Drug effect MAO inhibitors ⇑ Drug effect |
Ginseng (Panax ginseng, Panax quin-quefolia) | warfarin ⇓ Drug effect phenelzine ⇑ Drug effect | Anticoagulants Altered drug effect Antidiabetics ⇑ Drug effect Antiplatelets Altered drug effect Immunomodulators Altered drug effect MAO inhibitors ⇑ Drug effect |
Goldenseal (Hydrastis canadensis) | Anticoagulants ⇓ Drug effect Antihypertensives ⇓ Drug effect Immunomodulators Altered drug effect | |
Green tea (Camellia sinensis) | warfarin ⇓ Drug effect | |
Guggul (Commiphora mukul) | Anticoagulants ⇑ Drug effect Antiplatelets ⇑ Drug effect diltiazem ⇓ Drug effect | |
Hawthorn (Crataegus laevigata) | CNS depressants ⇑ Drug effect Antiarrhythmics Altered drug effect digoxin ⇑ Drug effect | |
Hibiscus (Hibiscus sabdarifa) | chloroquine ⇓ Drug absorption | |
Juniper (Juniperus communis) | Antidiabetics ⇓ Drug effect Diuretics ⇑ Drug effect lithium ⇑ Drug levels | |
Kava (Piper methysticum) | alprazolam ⇑ Drug effect levodopa ⇓ Drug effect | Antiepileptics ⇑ Drug effect CNS depressants ⇑ Drug effect |
Lemon balm (Melissa officinalis) | CNS depressants ⇑ Drug effect | |
Licorice (Glycyrrhiza glabra) | spironolactone ⇓ Drug effect | Antihypertensives ⇓ Drug effect Antiplatelets ⇑ Drug effect Corticosteroids ⇑ Drug effect digoxin ⇑ Drug effect Diuretics ⇑ Hypokalemia |
Meadowsweet (Filipendula ulmaria) | warfarin ⇑ Drug effect | |
Milk thistle (Silybum marianum) | indinavir ⇓ Drug concentration | CYP3A substrate Altered drug effect |
Oleander (Nerium oleander) | digoxin ⇑ Drug effect | |
Papaya (Carica papaya) | warfarin ⇑ Drug effect | |
Passionflower (Passiflora incarnate) | Antiepileptics ⇑ Drug effect CNS depressants ⇑ Drug effect warfarin ⇑ Drug effect | |
Peppermint (Mentha piperita) | Iron salts ⇓ Drug absorption | |
Psyllium (Plantago spp.) | Lithium ⇓ Drug absorption | digoxin ⇓ Drug effect |
Red clover (Trifolium pretense) | warfarin ⇑ Drug effect | |
Rosemary (Rosmarinus officinalis) | Antidiabetics ⇓ Drug effect | |
Saw Palmetto (Serenoa repens) | Hormone therapy ⇓ Drug effect warfarin ⇑ Drug effect | |
Senna (Cassia senna) | Corticosteroids ⇑ Hypokalemia digoxin ⇑ Drug effect | |
Soy (Glycine max) | warfarin ⇓ Drug effect | |
Uva ursi (Arctostaphylos uva ursi) | Iron ⇓ Drug absorption | |
Valerian (Valeriana officinalis) | Barbiturates ⇑ Drug effect | Antiepileptics ⇑ Drug effect CNS depressants ⇑ Drug effect |
Willow bark (Salix spp.) | warfarin ⇑ Drug effect | |
Yohimbe (Pausinystalia yohimbe) | Antihypertensives ⇓ Drug effect MAO inhibitors ⇑ Hypertension | |
St. John's wort (Hypericum perforatum) | alprazolam ⇓ Drug effect;amitriptyline ⇓ Drug level & effect;cyclosporine, digoxin ⇓ Drug level & effect;imatinib, indinavir ⇓ Drug level & effect;irinotecan, midazolam ⇓ Drug level; nifedipine, Oral contraceptives ⇓ Drug level & effect | amiodarone ⇓ Drug level & effect; amsacrine, carbamazepine ⇓ Drug effect; diltiazem ⇓ Drug level & effect; etoposide, omeprazole ⇓ Drug level & effect; |
St. John's wort (Hypericum perforatum) | SSRIs ⇓ Drug levels; imvastatin ⇓ Drug level; tacrolimus ⇓ Drug level; talinolol ⇓ Drug effect; theophylline, warfarin- Serotonin syndrome, ⇓ Drug level & effect | Triptans ⇓ Drug effect; verapamil Other CYP3A4 or P-gp substrate ⇑ Photosensitivity risk , ⇓ Drug level & effect, Serotonin syndrome |
Aloe (Aloe vera) | Antidiabetics ⇑ Drug effect; Antiplatelets ⇑ Drug effect ; digoxin ⇑ Drug effect ; Diuretics ⇑ Hypokalemia |