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Summary of Interactions with Vitamins, Herbs, & Foods
Replenish Depleted Nutrients
Reduce Side Effects
Teas and Herbs with Tannin
Tannins are a group of unrelated chemicals that give plants an astringent taste. Herbs containing high amounts of tannins, such as green tea (Camellia sinensis), black tea, uva ursi (Arctostaphylos uva-ursi), black walnut (Juglans nigra), red raspberry (Rubus idaeus), oak (Quercus spp.), and witch hazel (Hamamelis virginiana), may interfere with the absorption of atropine taken by mouth.1The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.
Potential Negative Interaction
The herb Anisodus tanguticus contains a chemical that has effects similar to atropine, a compound related to hyoscyamine.2 Though no human studies have investigated a possible adverse interaction between hyoscyamine and anisodus, individuals should avoid the combination until more is known.The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.
1. Brinker F. Herb Contraindications and Drug Interactions. Sandy, OR: Eclectic Institute, 1997, 100.
2. Qicheng F. Some current study and research approaches relating to the use of plants in the traditional Chinese medicine. J Ethnopharmacol 1980;2:57-63.
3. Qicheng F. Some current study and research approaches relating to the use of plants in the traditional Chinese medicine. J Ethnopharmacol 1980;2:57-63.
Last Review: 04-29-2014
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