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Horny Goat Weed Side Effects and Heart Cautions

Quick answer

Horny goat weed side effects can include sweating or feeling hot, a rapid irregular heartbeat, more energy and mood changes. Cardiovascular disease is a listed contraindication. Stallion Power lists horny goat weed extract last in an 82 mg blend, so one gummy holds 5 mg or less by our arithmetic.

Written by the Stallion Power label deskUpdated October 18, 2026 · 6 min read

The Supplement Facts side of the Stallion Power label — The Supplement Facts side, cut from the flat label file. It lists horny goat weed last and gives no amount.

Effects01

What are the side effects of horny goat weed?

The reported horny goat weed side effects are sweating or feeling hot, a rapid irregular heartbeat, increased energy and mood changes (MSKCC, Epimedium (horny goat weed)).

Memorial Sloan Kettering also states that toxicity and safety evaluations are lacking (MSKCC, Epimedium (horny goat weed)). That gap matters more than any single symptom on the list.

Heart02

Is horny goat weed safe for people with heart disease?

No safety has been shown. Cardiovascular disease is listed as a contraindication, so people with heart disease should avoid it (MSKCC, Epimedium (horny goat weed)).

The case reports include a fast heart rhythm with a manic mood in a patient with congestive heart failure, and a rash from inflamed vessels (MSKCC, Epimedium (horny goat weed)).

Reported problems and who should be careful.
Item	Detail
Common	Sweating, feeling hot, mood changes
Heart	Rapid irregular heartbeat
Case report	Heart rhythm problem with hypomania in heart failure
Case report	Vasculitic rash
Avoid if	You have cardiovascular disease

The gummy03

Does a Stallion Power gummy carry these risks?

The label gives no amount, but the blend order caps horny goat weed at 5 mg per gummy, our arithmetic, not a lab test.

A small share lowers the odds of a herb-driven effect, but it does not remove them. The gummy also holds 5 mg of caffeine, and green tea and ashwagandha in unknown amounts. The bar shows one gummy by printed weight.

One gummy by printed number, on one scale

Added sugar3,000 mg
Dry-powder equivalent of the blend567 mg
The 82 mg blend82 mg
Caffeine inside it5 mg

From the Supplement Facts panel: 3 g added sugar, an 82 mg blend (said to be equivalent to about 567 mg of dry powders) and 5 mg caffeine. The gummy weight is not printed. The bars share one scale, so the blend looks small next to the sugar.

Stallion Power: from $49 a bottle30 gummies · 2, 3 or 6 bottles · free shipping on 3 or 6 · 60-day guarantee

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Medicines04

Who should ask a doctor first?

Anyone with heart disease, a heart rhythm problem or a mood disorder, and anyone taking prescription medicine, should ask first.

Supplements can change how medicines work (FDA, Mixing medications and supplements). The label also tells pregnant or nursing women to consult a doctor, and to stop and consult one if any adverse reaction occurs. Our side effects page covers the full blend.

Reporting05

What should you do if you notice a reaction?

Stop the gummy, call your doctor for anything serious, and report the reaction to FDA (FDA, How to Report a Problem with Dietary Supplements).

Keep taking prescribed medicine as directed. Chest pain, fainting or a racing heart that will not settle needs urgent care. Hidden drugs have been found in some male enhancement products, and this gummy has no published lab report.

Want to try Stallion Power? Both packs ship free, and both come with the 60-day guarantee (all bottles returned, even empty ones).

3 bottles$207$69 a bottle · 90 days · Free shippingGet 3 bottles

6 bottles$294$49 a bottle · 180 days · Free shippingGet 6 bottles

Prices on the sales page, October 18, 2026 (Stallion Power sales page). Check your medicines with your doctor first.

FAQ06

Horny goat weed safety questions

Can horny goat weed make your heart race?

It has been reported to cause a rapid irregular heartbeat, and one case involved heart failure (MSKCC, Epimedium (horny goat weed)). If your heart races or skips, stop the product and seek medical advice.

Can you take horny goat weed with blood pressure medicine?

Ask a clinician first. Memorial Sloan Kettering advises caution with some medicines and avoidance in heart disease (MSKCC, Epimedium (horny goat weed)). Supplements can change how medicines work (FDA, Mixing medications and supplements).

How do I report a supplement reaction?

Use the FDA Safety Reporting Portal and stop the product first (FDA, How to Report a Problem with Dietary Supplements). Include the product name, what you felt and when it began.

Who wrote this07

Written and reviewed by

Written byThe Stallion Power label deskStallionpowermen, USA stocking retailer for Stallion Power

Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.

Medically reviewed byDr. Casey McCraw, MD, PhysicianRole: Medical reviewerReview date: October 19, 2026

Last updated October 18, 2026. Read our editorial standards and how we check reviews. This website is run by Stallionpowermen, a USA stocking retailer for Stallion Power, not by the manufacturer or the distributor. We are paid a commission when you buy through our order links.

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