Carya, Carya basilike, Carya persica, Green Black Walnut, Green Walnut, Juglans nigra, Jupiter’s Nuts, Nogal Americano, Nogal Negro, Nogueira-preta, Noix, Noix de Jupiter, Noix de Perse, Noix Verte, Noyer d’Amérique, Noyer Noir, Noyer Noir Américain, Nux persica, Nux regia, Schwarze Walnuss, Walnoot, Walnut.
Black walnut is a tree. People use the outer covering of the nut (the hull) to make medicine.
Black walnut is used to treat parasitic worm infections and certain other infections including diphtheria and syphilis. It is also used for leukemia.
Some people use black walnut as a gargle, apply it to the scalp as hair dye, or put it on the skin to treat wounds.
Black walnut contains high concentrations of chemicals called tannins, which can reduce pain and swelling and dry up body fluids such as mucous.
Insufficient Evidence for:
Use as a gargle.
More evidence is needed to rate the effectiveness of black walnut for these uses.
Black walnut might be safe for most people when taken by mouth short-term. It is not known what the possible side effects from short-term use might be.
Black walnut might be unsafe when applied to the skin. It contains a chemical called juglone that might cause tongue or lip cancer, especially if applied daily.
Special Precautions & Warnings:
Pregnancy and breast-feeding: Don’t apply black walnut to the skin if you are pregnant or breast-feeding. This topical use might be unsafe. It’s also best to avoid oral use. Not enough is known about the safety of taking black walnut by mouth during pregnancy or breast-feeding.
Minor Interaction. Be watchful with this combination:
Medications taken by mouth (Oral drugs) interacts with BLACK WALNUT
Black walnut hulls contains a large amount of chemicals called tannins. Tannins absorb substances in the stomach and intestines. Taking black walnut along with medications taken by mouth can decrease how much medicine your body absorbs, and decrease the effectiveness of your medicine. To prevent this interaction, take black walnut at least one hour after medications you take by mouth.