Report on Nettle Side Effects and Usage


Natural health supplements sometimes have unexpected side effects or interactions with medication that can lead to adverse reactions that are sometimes life threatening. The following is a list of cautions that you should be aware of before using Nettle (Urtica dioica). These are referred to as drug/herb interactions.

Warning 1 – Anticoagulants: Nettle may decrease the effect of anticoagulants. Experts recommend avoiding concurrent use.

Warning 2 – Central Nervous System Stimulants: Nettle may lead to increased CNS depression.

Warning 3 – Iron salts: Nettle may interfere with the absorption of iron salts.

Warning 4 – Lithium: Using Nettle with lithium may result in dehydration and/or lithium toxicity.

Warning 5 – Diuretics: Nettle may increase the affects of diuretics resulting in dehydration and hypokalemia. Experts recommend avoiding concurrent use.

Warning 6 – Drug/Herb interactions: Since nettle can also interact with certain other drugs, it’s important to consult your physician if you’re currently taking antiplatelet, anticoagulants, blood pressure medicine, diuretics, diabetes medication, and/or non-steroidal anti-inflammatory drugs.

Used as a natural health remedy: Nettle is used internally for the following benefits:

  • allergies
  • anemia
  • arthritis (See other herbs for inflammation)
  • eczema
  • enlarged Prostate
  • gout
  • hay fever
  • insect bites
  • joint pain
  • muscle pain
  • osteoarthritis
  • tendonitis
  • urinary tract infections

Side Effects of Nettle

The known side effects of Nettle include:

  1. skin irritation
  2. skin rash
  3. stomach upset
  4. sweating

Other side effects may also occur when using Nettle. (See form below)

Nettle is also known as stinging nettle and nettles.

As with any herb, a serious allergic reaction is possible. Seek immediate medical attention if you notice any symptoms of a serious allergic reaction. These may include a rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, or trouble breathing.

Return to the Herb List.

For questions and answers about the side effects of herbs see the Herb Forum

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