Horny Goat Weed Side Effects

Vomiting, dry mouth, and dizziness are some of the side effects that may occur with horny goat weed. In most cases, side effects of the supplement are usually minor, but there may be serious side effects that have not yet been discovered. With most herbal supplements, side effect information is based on small studies that are not designed to truly measure side effects.

Does Horny Goat Weed Cause Side Effects?

Even though it is a natural product, horny goat weed (Epimedium) may cause side effects. People often assume that natural products are always safe and free of side effects. However, this is simply not the case. It is reasonable to assume that any natural product with the capability to have medicinal properties may also have side effects.
 
(This article covers many, but not all, of the possible side effects with this supplement. Your healthcare provider can discuss a more complete list of horny goat weed side effects with you.)
 

Possible Side Effects of Horny Goat Weed

Possible bothersome (although not usually serious) side effects of horny goat weed may include:
 
  • Dizziness
  • Thirst
  • Vomiting
  • Dry mouth.
     

Serious Side Effects

Theoretically, horny goat weed could increase the risk of bleeding, including dangerous internal bleeding. This risk is probably most significant for people with bleeding disorders or who take "blood thinner" medications (see Horny Goat Weed Drug Interactions). Let your healthcare provider know if you develop any signs of bleeding, such as:
 
  • Frequent nosebleeds
  • Easy bruising
  • Cuts or scrapes that are slow to stop bleeding
  • Black, tarry stools; bright-red blood in the stool; or vomiting of blood (signs of gastrointestinal bleeding)
  • Signs of a hemorrhagic stroke (bleeding in the brain), such as vision or speech changes, weakness or numbness in an arm or leg, or a severe headache.
     
Other possible serious side effects of horny goat weed include:
 
  • A rapid heart rate (tachycardia)
  • Signs of an allergic reaction, such as:

 

    • A rash
    • Hives
    • Itching
    • Swelling of the mouth, lips, tongue, or throat
    • Wheezing or other difficulty breathing.

 

It should be noted that it is possible that there may be serious side effects of this supplement that have not yet been discovered. With herbal remedies, such as horny goat weed, the careful studies designed to test safety (and efficacy) are rarely performed, so most side effect information is based on small studies (which are usually not designed to truly measure side effects) or individual case reports.
 
 
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