Yohimbe bark often used to treat impotence

Yohimbe bark extract comes from a tall evergreen tree native to the jungles of West Africa, where the bitter bark has long been used as an aphrodisiac. Its active ingredient, yohimbine, is available in the U.S. as a prescription drug sometimes used to treat impotence. Recently, yohimbe has been sold as a supplement and marketed for bodybuilding and weight loss.

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Uses: Yohimbe bark extract is taken as a remedy for impotence and to increase sex drive.

Dose: Many manufacturers recommend 10 to 30 milligrams of yohimbe a day, taken in three to four doses for no more than 10 weeks. Yohimbe is available in capsules, tablets and liquid form; bark shavings can be used to make tea.

Precautions: Because yohimbe can increase blood pressure and may cause anxiety, insomnia, tremors, nausea and dizziness, it is not recommended for people with high or low blood pressure, diabetes, nervous disorders or heart, liver or kidney disease. People taking the supplement should avoid stimulants and foods containing the amino acid tyramine, found in red wines, aged cheeses and some meats, as it may increase the supplement’s effect on blood pressure. Yohimbe may worsen symptoms of people with depression.

Research: Studies on impotence and sex drive have produced mixed results but indicate that the supplement does not affect sexual desire in women.

Dietary supplement makers are not required by the U.S. government to demonstrate that their products are safe or effective. Ask your health-care provider for advice on selecting a brand.

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-- Elena Conis