Urtica dioica L. Family: Urticaceae
common nettle, greater nettle, stinging nettle
Stinging nettle is a medicinal herb plant known for its stinging leaves. It has tiny
stinging hairs covering its surface. Contact with the plant produces a stinging, itchy,
or burning rash on your skin. It also causes swelling and redness at the site of contact.
This reaction is due to histamine from the plant that’s released when the hairs pierce
There are several species of stinging nettle. These include Urtica dioica, Urtica
urens, and Urtica pilulifera. Nettle grows wild in temperate regions. It can reach
2 to 3 feet in height. Nettle has a long reputation in folk medicine. It’s used to
treat asthma. It’s also used as an expectorant, astringent, tonic, anti-spasmodic,
Medically valid uses
Nettle is used to treat benign prostatic hypertrophy (BPH). It’s used with other treatments.
Nettle extract may help BPH by binding to sites on sex hormone binding globulin (SHBG).
This lessens testosterone's effect on the prostate. But studies conflict on how well
it works. More research is needed.
There may be benefits that have not yet been proven through research.
Nettle extract may get in the way of inflammation. Inflammation is a major cause of
pain and joint damage due to arthritis. But there’s little evidence to support how
well this herb works for this condition. More research is needed.
Nettle may help manage:
Nettle comes in the form of tablets, liquid, tincture and tea. The dose may vary depending
on conditions being treated. Follow directions on the package or talk with your healthcare
provider for dosing information.
Side effects, toxicity, and interactions
This herb doesn’t cause side effects when you use it correctly. Allergic reactions
only happen in rare cases. Nettle may cause stomach cramps or diarrhea. If this happens,
stop using it or use less of it.
Women who are pregnant or breastfeeding shouldn’t take this herb. This is because
it can act like a diuretic.
Nettle can change the effects of medicines that affect blood pressure. These include
diuretics and anti-hypertensives.
Don't take nettle if you take medicines, herbs, or other supplements. Check with your
healthcare provider or pharmacist first.