Atropine is an alkaloid (a family of chemicals with pharmacologic activity and a common
structure) that affects the nervous system. It is found in deadly nightshade (Atropa
belladonna) and other plants. Some effects of atropine include blurred vision, dilated
pupils, constipation, dry mouth, and dry eyes.
Atropine is available as a prescription drug, synthesized in the laboratory. It is used to
help restore or control heart function. It is used in combination with other drugs to treat
other health problems including diarrhea and
excessive salivation (saliva production). Atropine drops (Isopto® Atropine and others)
are used to dilate pupils for eye exams.
Interactions with Vitamins, Herbs, and Foods
In some cases, an herb or supplement may appear in more than one category, which may seem
contradictory. For clarification, read the full article for details about the summarized
Avoid: Reduced drug absorption/bioavailability—Avoid these supplements
when taking this medication since the supplement may decrease the absorption and/or activity
of the medication in the body.
Tannin-containing herbs* such as green tea, black tea, uva ursi,
black walnut, red raspberry, oak, and witch hazel
|Depletion or interference
|Side effect reduction/prevention
An asterisk (*) next to an item in the summary indicates that the
interaction is supported only by weak, fragmentary, and/or contradictory scientific
Interactions with Herbs
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.1
1. Brinker F. Herb Contraindications and Drug Interactions.
Sandy, OR: Eclectic Institute, 1997, 100.