Evidence-based·Last reviewed May 30, 2026·How we grade evidence

Yohimbine

PhytochemicalAlkaloidBest taken away from food

Useful mainly for erectile dysfunction where PDE5 inhibitors are unsuitable, under supervision.

Quick decision guide

May help most

Erectile dysfunction where PDE5 inhibitors are unsuitable, under supervision

Common dosing range

5.4 mg three times daily (Rx); supplements 2.5–10 mg/dose

When to expect effects

Weeks for erectile function

Watch out for

Raises blood pressure and heart rate; contraindicated in cardiovascular and anxiety disorders

What is it

Yohimbine is an indole alkaloid derived primarily from the bark of the African Pausinystalia johimbe tree. It acts as a selective alpha-2 adrenergic receptor antagonist and is used in prescription form for erectile dysfunction in some countries, and in supplement form for sexual function, fat loss, and athletic performance.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if…

You have erectile dysfunction and PDE5 inhibitors are unsuitable
You have no cardiovascular, psychiatric, or relevant contraindication
You can start low and use it under medical supervision

Probably skip if…

You have hypertension, heart disease, arrhythmia, or anxiety disorders
You take MAO inhibitors, antidepressants, stimulants, or BP medications
You are pregnant, breastfeeding, or want a casual fat-burner

Evidence at a glance

erectile dysfunction

Good Evidence
Effect
Modest
Best fit
Men with erectile dysfunction, particularly non-organic or where PDE5 inhibitors are unsuitable
Time
Weeks

fat loss in lean individuals

Limited Evidence
Effect
Modest
Best fit
Lean, exercising individuals using it fasted
Time
Weeks

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

erectile dysfunction

Disease adjunct
Good Evidence

Yohimbine antagonizes alpha-2 adrenergic receptors, raising central noradrenergic tone and acting on penile vasculature, the basis for its long use in erectile dysfunction. Controlled trials show modest benefit over placebo, but it has largely been replaced by more effective, better-tolerated PDE5 inhibitors. It remains an option mainly when those are unsuitable.

Effect size
Modest
Time to effect
Weeks
Best fit
Men with erectile dysfunction, particularly non-organic or where PDE5 inhibitors are unsuitable

Bottom line: Modestly effective for erectile dysfunction, but second-line to PDE5 inhibitors.

SourceErnst et al., 1998 — PubMedVogt et al., 1997 — PubMed

fat loss in lean individuals

Supplement benefit
Limited Evidence

Blocking alpha-2 receptors in adipose tissue may promote fatty-acid release, especially in 'stubborn' fat with high alpha-2 density, and the effect is greater when fasted because insulin blunts lipolysis. Body-composition effects in controlled trials are modest and seen mainly in lean, active people. Side-effect risk rises with dose.

Effect size
Modest
Time to effect
Weeks
Best fit
Lean, exercising individuals using it fasted
Less likely
People expecting substantial weight loss or using it without diet and exercise

Bottom line: Only modest fat-loss effects in lean, fasted, exercising individuals, with notable side-effect risk.

Evidence is mixed

Trials are small with inconsistent body-composition outcomes; benefit appears limited to specific lean, fasted contexts.

SourceOstojic et al., 2006 — PubMed· conflicting
SourceOstojic et al., 2006 — PubMed

How it works

Yohimbine selectively blocks alpha-2 adrenergic receptors. These receptors normally provide negative feedback that inhibits norepinephrine release; by blocking them, yohimbine increases sympathetic nervous system activity, raising noradrenergic tone, heart rate, and blood pressure to varying degrees. In the context of sexual function, increased noradrenergic activity in the central nervous system and peripheral effects on penile blood vessels (via alpha-2 receptor antagonism in penile vasculature) contribute to its historical use for erectile dysfunction. Yohimbine is one of the oldest pharmaceutical agents studied for this purpose, though it has largely been replaced by more effective and better-tolerated PDE5 inhibitors. For fat loss applications, yohimbine's blockade of alpha-2 adrenergic receptors in adipose tissue (which normally inhibit lipolysis) may promote release of fatty acids from fat cells, particularly in 'stubborn' adipose deposits with high alpha-2 receptor density. Effects on body composition in controlled trials are modest. Yohimbine is more lipolytically effective when fasted because insulin blunts its lipolytic action.

How to take it

1. Typical dose
Pharmaceutical yohimbine HCl 5.4 mg three times daily; supplements 2.5–10 mg per dose
2. Timing
Empty stomach; for fat-loss use 30–60 minutes before fasted exercise; avoid after 4 PM
3. With food
On an empty stomach
4. Split dosing
Space doses several hours apart; start at 2.5 mg to assess tolerance
5. How long to try
Trial several weeks for erectile function

What to track

Blood pressure and heart rate
Anxiety, jitteriness, sleep
Erectile function response

3 commercial forms

Compare the main delivery options and what they’re best suited for.

Yohimbine hydrochloride

Most reliable form. Prescription in some countries, supplement-grade in the US.

Purified pharmaceutical-grade compound

Yohimbe bark extract

Less standardized form. FDA has flagged inconsistent labeling and potency.

Variable yohimbine content, contains other alkaloids

Alpha-yohimbine (rauwolscine)

Sometimes used in pre-workout products. Less well studied than yohimbine itself.

Related alkaloid with similar but slightly different selectivity

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

AnxietyJitterinessElevated heart rateElevated blood pressureHeadacheSweatingDizzinessNauseaInsomnia

Serious risks

  • Severe hypertension

  • Cardiac arrhythmias

  • Panic attacks

  • Seizures (more likely at high doses)

Who should avoid it

  • People with hypertension, heart disease, or arrhythmias
  • Kidney or liver disease
  • Anxiety disorders, depression, or PTSD
  • Peptic ulcer disease
  • People on MAO inhibitors
  • People on BP medications, antidepressants, or stimulants without supervision

Pregnancy & breastfeeding

Avoid in pregnancy and breastfeeding.

Interactions

MAO inhibitorsMajor

Risk of hypertensive crisis

Stimulants (caffeine, amphetamines, decongestants)Major

Additive sympathetic stimulation

Clonidine and alpha-2 agonistsMajor

Yohimbine antagonizes their effects

Tricyclic antidepressants and SSRIsModerate

May interact and raise noradrenergic effects

Blood pressure medicationsModerate

Can interfere with blood pressure control

Documented interactions

Evidence-graded pair pages with sources, dosing notes, and timing guidance — a complement to the narrative section above.

Warnings (1)

+ caffeine

high

Caffeine and yohimbine are both stimulants that activate the sympathetic ('fight or flight') nervous system through different routes. Caffeine blocks adenosine receptors and raises catecholamine output; yohimbine blocks alpha-2 adrenergic receptors, increasing norepinephrine release. Taken together they add to each other's effects on heart rate, blood pressure, and anxiety. Yohimbine-containing products have been linked to emergency-department visits and hospitalizations for fast heart rate, high blood pressure, and severe anxiety.

See all 1 Yohimbine interaction →

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for…

Standardized yohimbine HCl with exact mg per dose
Avoid poorly standardized yohimbe bark extracts

Be skeptical of…

Safe natural fat burner
Boosts energy and performance
Effortless stubborn-fat loss

Frequently asked questions

Is yohimbine safe?⌄

Yohimbine can cause significant side effects including hypertension, anxiety, palpitations, and panic attacks, particularly at high doses or in people with cardiovascular or psychiatric conditions. Use cautiously with low starting doses and avoid if you have relevant medical conditions or take interacting medications.

Will yohimbine help me burn stubborn fat?⌄

Small trials in lean athletes suggest modest fat loss benefit when combined with fasted exercise. Effects are unreliable in overweight or non-fasted individuals. Side effects often outweigh modest benefits for many users.

What's the difference between yohimbine and yohimbe?⌄

Yohimbine is the purified alkaloid. Yohimbe refers to the bark of Pausinystalia johimbe tree, which contains yohimbine plus other alkaloids. Yohimbe bark extracts have highly variable yohimbine content and are less reliable.

Can I take yohimbine with caffeine?⌄

Combining yohimbine with caffeine or other stimulants can substantially increase cardiovascular and anxiety side effects. Use combinations with caution and at lower doses.

Who should not take yohimbine?⌄

Avoid yohimbine if you have hypertension, heart disease, kidney or liver disease, anxiety or panic disorder, depression, PTSD, peptic ulcer disease, or take MAO inhibitors, blood pressure medications, antidepressants, or stimulants. Also avoid in pregnancy.

References by claim

erectile dysfunction

Ernst et al., 1998 — PubMed (1998) link

Vogt et al., 1997 — PubMed (1997) link

fat loss in lean individuals

Ostojic et al., 2006 — PubMed (2006) link

Track Yohimbine with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·Last reviewed May 30, 2026·Evidence current as of May 30, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.