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Lomotil®/Lonox®

Illustration

This is a combination drug containing two ingredients, diphenoxylate and atropine, that is used in the treatment of diarrhea. Diphenoxylate is in a class of drugs known as antidiarrheals.

Summary of 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 interactions.

Avoid 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

None known

Side effect reduction/prevention

None known

Supportive interaction

None known

Adverse interaction

None known

An asterisk (*) next to an item in the summary indicates that the interaction is supported only by weak, fragmentary, and/or contradictory scientific evidence.

Interactions with Herbs

Tannin-containing 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 the drug when taken by mouth.1

Interactions with Foods and Other Compounds

Alcohol
Diphenoxylate may enhance the actions of alcohol,2 resulting in increased drowsiness, dizziness, imbalance, and poor response times. Therefore, people taking diphenoxylate should avoid alcohol, especially when staying alert is necessary.

References:

1. Brinker F. Herb Contraindications and Drug Interactions. Sandy, OR: Eclectic Institute, 1997, 100.

2. Sifton DW, ed. Physicians Desk Reference. Montvale, NJ: Medical Economics Company, Inc., 2000, 2923–4.

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