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Horny Goat Weed Side Effects: What Is Known?
Horny goat weed side effects reported in the literature include sweating, feeling hot, a rapid irregular heartbeat, mood changes and a rash. The reports come from case notes and herb-formula studies, not large safety trials. Horny goat weed is the first line in the SodaPeak blend, with no amount printed.
Written by the SodaPeak label deskUpdated · 4 min read
Does horny goat weed have side effects?
Reported horny goat weed side effects are sweating or feeling hot at high doses, a rapid irregular heartbeat, mood changes and a rash from inflamed blood vessels (MSK, Epimedium (Horny Goat Weed)).
These come from reports, not from large safety trials. Many trials test the herb inside multi-herb formulas, so its own effect cannot be pulled out.
Memorial Sloan Kettering says not to use it with heart disease and to be careful with hormone-sensitive cancers.
| Effect | Note |
|---|---|
| Sweating, feeling hot | At high doses |
| Rapid irregular heartbeat | Why heart disease is a reason to avoid it |
| Mood changes | Reported, cause unclear |
| Vasculitic rash | Reported |
| Drug effects | May blunt aromatase inhibitors; clinical meaning unknown |
What is icariin, and does it change the risk?
Icariin is the best-known compound in horny goat weed leaf, and it is the main reason the herb is studied.
Labels rarely say how much icariin a capsule holds. SodaPeak lists "Horny Goat Weed Extract (Epimedium Sagittatum) Leaf" and gives no icariin figure.
The sheet adds that icariin may blunt aromatase inhibitors and affect drugs cleared by the CYP3A4 enzyme. Its clinical meaning is unknown, so interactions are an open question, not a known harm.
How much horny goat weed can a SodaPeak serving hold?
At most 1,200 mg per serving, and almost surely less. Horny goat weed is listed first, so by label order it is the heaviest line, but all eight lines share the 1,200 mg.
An even split would give 150 mg each. Neither number is a measured dose, and no threshold for side effects is known.
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See packsWho should be careful with horny goat weed?
People with heart disease, a hormone-sensitive cancer or a medicine cleared by CYP3A4 should ask a doctor before using any product with horny goat weed.
Keep taking prescribed medicine, and show your pharmacist the bottle. See supplements and medicines.
A heart that races, chest pain or fainting needs care now: call 911. Report problems to FDA MedWatch (FDA MedWatch, adverse event reporting).
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Listing prices, October 19, 2026 (eBay listing for SodaPeak). The listing prints prices for 1 and 2 bottles only, and import fees can apply. The seller states a 60-day guarantee; the listing prints 30-day returns. Compare the packs.
Does horny goat weed work for libido or stamina?
No good trial shows that it does. Fatigue and sexual dysfunction are traditional uses that have not been tested in clinical trials (MSK, Epimedium (Horny Goat Weed)).
The NIH-linked review of herbs for sexual enhancement finds no definitive evidence that any herbal product is safe or effective for erectile dysfunction (NCCIH, Sexual-Enhancement Supplements).
More detail is on the horny goat weed ingredient page. Other side effects are in SodaPeak side effects, and the short answer sums them up.
FAQ01
SodaPeak questions people ask
Can horny goat weed cause a fast heartbeat?
Yes, a rapid irregular heartbeat is among the reported effects, and Memorial Sloan Kettering says not to use the herb with heart disease (MSK, Epimedium (Horny Goat Weed)). If your heart races or you faint, seek care.
Is icariin the same as horny goat weed?
No. Icariin is one compound found in the leaf, while horny goat weed is the whole plant material. The SodaPeak label lists the leaf extract and prints no icariin amount, so that dose is unknown.
Does horny goat weed interact with medicines?
It may. Icariin may blunt aromatase inhibitors and affect drugs cleared by CYP3A4, though the clinical meaning is unknown (MSK, Epimedium (Horny Goat Weed)). Tell your pharmacist about every supplement you use.
Do side effects depend on the amount in SodaPeak?
Possibly, but the amount is not printed. By label order the horny goat weed line can weigh at most 1,200 mg per serving, and an even split would be 150 mg. Neither is a measured dose.
Who wrote this02
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Learn about our editorial standards and how we check reviews. This website is run by Sodapeakdaily, a retailer of SodaPeak, not by the manufacturer. We make money when you buy through our order links.
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