Yohimbine is an alkaloid that is found in the bark of a West African evergreen tree—the yohimbe tree. Yohimbine might help treat impotence that can be caused by a variety of factors, although it comes with many risks.

Commonly Used Product Names

  • Yohimbine hydrochloric acid (HCL)—a prescription drug in a tablet
  • Yohimbe bark—available in the following forms:
    • Capsule
    • Concentrated drops
    • Decoction (an extract obtained from boiling)
    • Tablet
    • Tea
    • Tincture

Yohimbe bark is often not standardized based on yohimbine content. Therefore, it is a less reliable source than the drug form.

Sexual Effects

Yohimbine has a long history of being used as an aphrodisiac. Some studies have suggested that it may have the following pro-sexual effects:

  • Helps to obtain and maintain erection
  • Enhances quality of erection

Side Effects

Since the effective level of yohimbine is close to its toxic level, it is not clear that its benefits outweigh its risks. Side effects include:

  • Anxiety
  • Nervousness
  • Panic attacks
  • Tremors
  • Elevated blood pressure and heart rate
  • Salivation
  • Nausea
  • Irritability
  • Insomnia
  • Urinary frequency
  • Excessive sweating
  • Fatigue
  • Hallucinations
  • Paralysis

Cautions

Yohimbine may cause adverse reactions when taken with certain medications. These include:

  • MAO inhibitors—When combined with yohimbine, MAO inhibitors can cause dangerously high blood pressure.
  • Antidepressants—Yohimbine can interact with most types of antidepressants.
  • Antihypertensives—Yohimbine may increase blood pressure-lowering effects.
  • Nasal decongestants
  • Phenylpropanolamine-containing diet aids

If you have one of the following conditions, talk to your doctor before taking yohimbine:

Yohimbine is not usually prescribed for women. It should never be taken during pregnancy or while breastfeeding.

Yohimbine is classified as an MAO inhibitor. When taking MAOIs, you should avoid the following foods:

  • Foods with a high-tyramine content, such as
    • Cheese
    • Alcohol
    • Pickled or marinated or smoked or cured or fermented foods
    • Organ meats
    • Nuts, peanut butter
    • Fava beans
    • Onions
    • Avocados
    • Canned figs
    • Chocolate
    • Excess amounts of caffeine
  • Foods containing monosodium glutamate (MSG)