Yohimbe Side Effects: What Men Should Know Before Buying

Short answer: The most commonly reported yohimbe side effects are a fast heartbeat, high blood pressure, anxiety or agitation, and stomach upset. Yohimbine, the main compound in yohimbe bark, has also been linked to irregular heart rhythm, heart attacks and seizures. Product labels are often inaccurate, so you rarely know how much you are taking. The U.S. National Center for Complementary and Integrative Health (NCCIH) says there is not enough evidence that yohimbe works for any health condition, which is why most men are better off avoiding it and talking to a doctor instead.

Key Takeaways

• Yohimbe bark contains yohimbine, a stimulant that blocks alpha-2 adrenergic receptors and increases the release of norepinephrine, which explains both its effects and its risks.^[1][3]
• A California Poison Control System review of 238 yohimbe cases found stomach upset in 46%, a rapid heartbeat in 43%, anxiety or agitation in 33% and high blood pressure in 25%.^[4]
• In an analysis of 49 U.S. yohimbine supplement brands, only 2 (4.1%) gave accurate quantity information on the label.^[3]
• Some products tested contained up to 12 mg of yohimbine per serving, which is more than the old prescription dose of 5 to 10 mg.^[2]
• People taking MAO inhibitors or tricyclic antidepressants should avoid yohimbe, and anyone on a medication should check with a clinician first.^[1]
• Yohimbe supplements are restricted or banned in many countries because of inaccurate labeling and serious side effects.^[1]

What Yohimbe Is and Why It Is Different From Most Herbs

Yohimbe (Pausinystalia johimbe) is an evergreen tree from central and western Africa. Its bark has traditionally been used as an aphrodisiac, a sexual performance aid and a mild hallucinogen. Today it is sold in pills and powders promoted for sexual function, workouts, weight loss and mood.^[1]

The active compound is yohimbine. Most herbs sold for men’s wellness have mild, slow effects. Yohimbine is closer to a drug. It was once approved by the FDA as a prescription treatment for impotence, before modern prescription options existed, and was later taken off the market because of potential heart and nervous system adverse effects.^[3] The same compound still shows up in over the counter supplements, often in amounts that look more like a prescription dose than a natural extract.^[2]

NCCIH also points out that the yohimbe in supplements may not act like prescription yohimbine, because the amount and source vary so much from product to product.^[1]

How yohimbine works in the body

Yohimbine blocks alpha-2 adrenergic receptors, both before and after the nerve junction. These receptors normally act as a brake on the release of norepinephrine. When the brake is removed, norepinephrine and dopamine levels rise.^[3] That surge is what produces the stimulant feeling, and it is also what drives the heart rate, blood pressure and anxiety problems described below.

Yohimbe Side Effects: What the Reports Show

Very few studies in people have tested yohimbe as a dietary supplement, but its risks are well documented.^[1] The best real world data come from poison control centers and case reports.

Common side effects

Researchers led by Christine Haller reviewed yohimbe exposures reported to the California Poison Control System and published the results in The Annals of Pharmacotherapy in 2010. They counted 238 cases, and yohimbe related adverse events rose from 1.8 to 8 per 10,000 adult exposures over the study period. Many people had more than one symptom.^[4] NCCIH adds that people who called poison control about yohimbe were generally more likely to need medical care than other callers.^[1]

Serious and rare reactions

At toxic levels yohimbine produces what doctors call a sympathomimetic toxidrome: racing heart, high blood pressure, high body temperature, heavy sweating, tremor, and in some cases seizures and psychosis. There is no antidote, so treatment is supportive care in a hospital.^[3] The Vanderbilt poison center notes that the exact dose at which harm starts is unknown, which is a problem when labels are unreliable.^[3]

Case reports summarized by Drugs.com also describe rash, a lupus like reaction, bronchospasm and arrhythmias. A 2016 American Heart Association scientific statement listed yohimbine among products with possibly harmful cardiovascular effects and as possibly harmful in heart failure.^[5]

The Label Problem: You Often Do Not Know the Dose

A side effect profile is only half the story. The other half is that you usually cannot tell how much yohimbine a product contains.

Pieter Cohen of Harvard Medical School and colleagues at the National Center for Natural Products Research tested 49 yohimbine supplement brands bought from major U.S. retail chains. Their findings, published in Drug Testing and Analysis:^[2][3]

• Only about 22% of products listed a yohimbine amount at all, and most of those amounts were wrong.
• Only 4% listed both an accurate amount and at least one side effect.
• Some products delivered up to 12 mg of yohimbine per serving, more than the former prescription dose of 5 to 10 mg.
• The researchers did not find the other compounds normally present in true yohimbe bark, which suggests the yohimbine came from another source.

NCCIH summarizes it plainly: most products do not state their yohimbine content, amounts vary widely, and most do not disclose known side effects.^[1] Cohen told reporters the products were “more similar to a prescription drug than they were to a natural extract.”^[2] Our guide to third-party tested supplements explains how independent testing helps you avoid this kind of surprise.

Does Yohimbe Work? What the Evidence Says

Yohimbe is marketed mostly for sexual performance, so it is fair to ask whether the risk buys any proven benefit.

Human evidence

Older clinical trials used purified, prescription grade yohimbine hydrochloride, not bark supplements. Meta-analyses of those trials concluded that yohimbine did better than placebo in some, but not all, men, while noting weaknesses such as small sample sizes, reporting bias and a strong placebo effect.^[5] The American Urological Association guideline did not recommend yohimbine for erection problems.^[5]

For supplements, NCCIH says research is not enough to show whether yohimbe helps with erectile dysfunction, athletic performance or weight loss.^[1] It also notes that marketing an over the counter yohimbine product as a treatment for erectile dysfunction without FDA approval is illegal in the United States.^[1]

Animal evidence

Animal data add caution rather than reassurance. Drugs.com summarizes reports of increased motor activity and seizures at higher doses in animals, and a rodent reproductive study in which high doses were linked to lower sperm count and motility.^[5] Animal results do not translate directly to people, but they do not support the idea that yohimbe is harmless.

If you are having trouble with erections, the right first step is a visit to a doctor. Erection problems can be an early sign of heart disease, diabetes or high blood pressure, and a clinician can check for those and discuss proven options.

Who Should Avoid Yohimbe

Given the side effect profile, the list of people who should stay away is long. Based on NCCIH, Drugs.com and poison center guidance:^[1][3][5]

• People with heart disease or high blood pressure: yohimbine can raise heart rate and blood pressure and has been linked to arrhythmias and heart attacks.
• People taking MAO inhibitors or tricyclic antidepressants: NCCIH says to avoid yohimbe with these drugs.
• People taking blood pressure or anti-anxiety medication: yohimbine may reduce how well these medicines work.
• People with anxiety, panic disorder or a history of psychosis: anxiety and agitation are among the most common reported effects.
• People with kidney or liver disease: listed as contraindications.
• Anyone pregnant or breastfeeding: oral use may be unsafe.
• Anyone stacking stimulants: yohimbine is common in pre-workout and fat burner blends with caffeine, which adds to the strain on the heart.

Even if none of these apply to you, talk to your doctor or pharmacist before taking any product that lists yohimbe, yohimbine, yohimbine HCl or Pausinystalia johimbe on the label.

Warning signs that need medical help

Stop the product and seek urgent care for chest pain, a pounding or irregular heartbeat, severe headache, confusion, fainting, seizures, or a feeling of panic that does not settle. In the United States, Poison Control can be reached at 1-800-222-1222.

Safer Ways to Support Your Vitality

Most men who look at yohimbe want more energy, drive or confidence. Sleep, regular exercise, a heart healthy diet, limiting alcohol and managing stress do more for those goals than any stimulant, and none of them come with a heart rhythm warning. If you want to learn about other botanicals, read our guides to Panax ginseng for men and horny goat weed, keeping in mind that every herb deserves a conversation with your doctor, especially if you take medication.

Ultra Bann, a natural male vitality supplement by DL Bioproducts, takes a different approach from stimulant blends. Each capsule holds seven botanicals with every amount printed on the label and no proprietary blend: Thai Butea superba 345 mg, Panax ginseng 110 mg, Cynomorium songaricum 85 mg, black ginger (Kaempferia parviflora) 85 mg, tongkat ali 85 mg, epimedium 45 mg and reishi 45 mg, for 800 mg in total, taken one capsule every 2 days. You can check the full ingredient label before you decide. The herb covered in this article is not one of those seven. First orders come with free US shipping and a 60-day money-back guarantee at the Ultra Bann shop. As with any supplement, check with your doctor first if you have a health condition or take medication.

Frequently Asked Questions

Is yohimbe safe to take?

Yohimbe has a poor safety record for a supplement. It has been linked to rapid heartbeat, high blood pressure, anxiety, irregular heart rhythm, heart attacks and seizures, and labels are often inaccurate.^[1][3] NCCIH says there is not enough evidence that it works for any condition. Most people should avoid it, and no one should take it without talking to a doctor.

How long do yohimbe side effects last?

The sources reviewed here do not give a reliable timeline, and it likely depends on the dose and the person. Because the dose at which harm begins is unknown and labels are often wrong, any chest pain, racing heart or severe anxiety after taking yohimbe should be treated as urgent. Call Poison Control or seek emergency care rather than waiting it out.

Is yohimbe the same as yohimbine?

Not exactly. Yohimbe is the tree and its bark. Yohimbine is the main active compound in that bark. Prescription yohimbine hydrochloride was a purified drug, while supplements sold as yohimbe vary widely, and testing suggests some contain yohimbine that did not come from real bark extract.^[1][2]

Can you take yohimbe with caffeine or pre-workout?

Combining stimulants increases the load on the heart and the risk of anxiety, high blood pressure and rhythm problems. Since yohimbine alone already causes these effects in a large share of poison control cases, stacking it with caffeine is a bad idea.^[4]

Is yohimbe banned?

In the United States yohimbe is still sold as a supplement, but marketing it as a treatment for erectile dysfunction without FDA approval is illegal. NCCIH reports that yohimbe supplements are restricted or banned in many other countries because of inaccurate labeling and serious side effects.^[1]

References

1. National Center for Complementary and Integrative Health. Yohimbe. NIH, updated May 2025. nccih.nih.gov/health/yohimbe
2. Live Science. Yohimbine supplements contain drug-like doses (report on the Drug Testing and Analysis study by Cohen and colleagues), September 2015. livescience.com
3. Vanderbilt University Medical Center, Tennessee Poison Center. Yohimbine or NO-himbine? A potentially fatal over-the-counter supplement, February 2022 (cites Cohen PA, et al. Drug Test Anal. 2016;8(3-4):357-69). vumc.org
4. NutraIngredients. Researcher calls for stimulant herb rethink (report on the California Poison Control System yohimbe study in The Annals of Pharmacotherapy), May 2010. nutraingredients.com
5. Drugs.com. Yohimbe: natural product monograph. drugs.com/npp/yohimbe.html

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. This article is for information only and is not medical advice.