Hempnettle Drug Interactions, Uses, Effectiveness, Safety & More

Hempnettle is a flowering plant in the mint family (Lamiaceae). The name is most often used for Galeopsis tetrahit, sometimes called common hempnettle. Despite the name, it is not related to cannabis (hemp) — the name comes from the shape of its leaves.

It grows as a weedy plant across much of Europe and parts of Asia, and it has spread to North America. It is often found in fields, along roadsides, and in disturbed soil.

In traditional European folk medicine, the dried above-ground parts of the plant were sometimes brewed into a tea and used for coughs and other minor breathing problems. Today it is uncommon as a supplement, and most uses are based on tradition rather than strong scientific study.

Hempnettle contains a mix of plant compounds, including iridoid glycosides, flavonoids, tannins, and some silica-containing substances. These types of compounds are common in many plants in the mint family.

In traditional use, the tannins and other compounds were thought to have a mild soothing or astringent effect that might ease throat irritation. Some lab studies suggest plant compounds like these can have antioxidant or mild antimicrobial activity in a test tube.

It is important to understand that these are mostly ideas based on the plant's chemistry and on laboratory or animal research. They do not prove that hempnettle has a meaningful effect in people when taken as a tea or supplement.

The safety of hempnettle has not been well studied in modern research. Because of this, its overall safety is best described as unknown. This does not mean it is dangerous, but it does mean we lack good information to confirm it is safe.

People with allergies to plants in the mint family may be more likely to react to it. Children, older adults, and people with chronic medical conditions should be especially cautious and check with a healthcare provider first.

Pregnancy and breastfeeding: There is not enough reliable information to consider hempnettle safe during pregnancy or while breastfeeding. To be safe, avoid using it during these times.

As with any herbal product, quality and purity can vary between brands, and products are not tightly regulated. Always talk with a pharmacist or doctor before starting hempnettle, especially if you take prescription medicines or have a health condition.

There is little documented information about side effects from hempnettle. With herbal teas in general, possible mild effects can include stomach upset, nausea, or an allergic reaction such as rash or itching.

Because the plant has not been carefully studied, rare or serious side effects cannot be ruled out. Stop using it and seek medical care if you notice signs of an allergic reaction, such as swelling, trouble breathing, or a spreading rash.

There is no established, science-based dose for hempnettle. A standard safe and effective amount has not been determined in research.

If you choose to use a product that contains it, follow the directions on the product label and do not exceed the suggested amount. Because doses and product strengths vary widely, it is a good idea to review the product with a pharmacist before using it.