Sweet Sumac Drug Interactions, Uses, Effectiveness, Safety & More

Sweet Sumac is a small, woody shrub known scientifically as Rhus aromatica. It belongs to the cashew family (Anacardiaceae), which also includes poison ivy and poison oak. The plant grows wild across much of North America, often in dry, rocky, or sandy areas.

It is sometimes called fragrant sumac because its crushed leaves give off a spicy or sweet smell. Traditionally, the bark of the root, the leaves, and the red berries have been used in folk and herbal medicine. The berries of related, non-toxic sumac species are also used to make a tart drink and seasoning, but Sweet Sumac itself has mostly been used as a medicinal herb.

People have historically prepared Sweet Sumac as a tea, tincture, or liquid extract, taken by mouth or used as a gargle.

Sweet Sumac contains tannins, which are plant compounds with an astringent effect. Astringents can tighten and dry tissues, and this is the traditional reasoning behind its use for diarrhea, mild bleeding, and as a mouth or throat rinse.

The plant also contains various plant acids and aromatic oils that give it its scent. Some related sumac plants have been studied in the laboratory for possible antioxidant and antimicrobial effects.

It is important to know that these proposed mechanisms are based mostly on the chemistry of the plant and on laboratory or animal research, not on solid studies in humans. We do not have good evidence showing how, or whether, Sweet Sumac produces meaningful effects in the body.

There is limited modern safety information for Sweet Sumac. Because it is in the same plant family as poison ivy and poison oak, some people may be sensitive to it, and handling the plant could cause skin irritation in sensitive individuals.

People with kidney problems, liver problems, or chronic digestive disorders should be cautious and check with a healthcare provider before using it. Tannin-rich herbs taken in large amounts or for long periods may upset the stomach.

Pregnancy and breastfeeding: There is not enough reliable safety information for these situations. To be safe, women who are pregnant or breastfeeding should avoid Sweet Sumac.

Do not confuse Sweet Sumac with poison sumac (Toxicodendron vernix), which is a different, toxic plant. Always buy herbal products from reputable sources so you know exactly what you are getting.

Because Sweet Sumac has not been carefully studied, its full side effect profile is not well known. Possible effects, based on its tannin content and plant family, include:

• Stomach upset or nausea, especially with large amounts
• Mouth or throat dryness when used as a gargle
• Skin irritation or allergic reactions in people sensitive to plants in this family

Stop using it and seek medical care if you have signs of an allergic reaction, such as rash, swelling, or trouble breathing.

There is no established, standardized dose for Sweet Sumac. It has traditionally been taken as a tea, tincture, or liquid extract made from the root bark or leaves, but reliable dosing guidelines from clinical research are not available.

If you choose to use a commercial product, follow the directions on the label and do not exceed the suggested amount. Because product strength can vary a lot, it is wise to check with a pharmacist or doctor first, especially if you take other medicines or have a health condition.