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Herbal Therapy

Selected Herb-Drug Interactions

Herbal Ingredient Common Name Documented Drug InteractionPotential 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
Popular Pharmacology sets

 

 



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