Gotu kola (Centella asiatica) has been used to treat many conditions for thousands of years in India, China, and Indonesia. It was used to heal wounds, improve mental clarity, and treat skin conditions such as leprosy and psoriasis.

Some people use it to treat respiratory infections, such as colds, and in the past it was used for that in China. It has been called "the fountain of life" because legend has it that an ancient Chinese herbalist lived for more than 200 years as a result of taking gotu kola.

Historically, gotu kola has also been used to treat syphilis, hepatitis, stomach ulcers, mental fatigue, epilepsy, diarrhea, fever, and asthma. Today, in the U.S. and Europe gotu kola is most often used to treat varicose veins and chronic venous insufficiency, a condition where blood pools in the legs. It is also used in ointments to treat psoriasis and help heal minor wounds.

Gotu kola is not the same as kola nut (Cola nitida). Unlike kola nut, gotu kola does not have caffeine and is not a stimulant.

Gotu kola is a perennial plant native to India, Japan, China, Indonesia, South Africa, Sri Lanka, and the South Pacific. A member of the parsley family, it has no taste or smell. It thrives in and around water. It has small fan-shaped green leaves with white or light purple-to-pink flowers and small oval fruit. The leaves and stems of the gotu kola plant are used as medicine.

Treatment

Venous insufficiency and varicose veins

When blood vessels lose their elasticity, blood pools in the legs and fluid leaks out of the blood vessels. That causes the legs to swell (venous insufficiency). Several small studies suggest gotu kola may help reduce swelling and improve blood flow. In a study of 94 people with venous insufficiency, those who took gotu kola saw their symptoms improve compared to those who took a placebo.

One study also found that people who took gotu kola before flying had less ankle and leg swelling than those who did not take it.

Wound healing and skin lesions

Gotu kola has chemicals called triterpenoids. In animal and lab studies, these compounds seem to help heal wounds. For example, some studies suggest that triterpenoids strengthen the skin, boost antioxidants in wounds, and increase blood supply to the area. Based on these findings, gotu kola has been applied to the skin, or used topically, for minor burns, psoriasis, preventing scars after surgery, and preventing or reducing stretch marks.

You can find gotu kola in many creams for wound healing. Ask your health care provider if one is right for you.

Gotu kola is available in teas and as dried herbs, tinctures, capsules, tablets, and ointments. Products should be stored in a cool, dry place and used before the expiration date on the label.

Gotu kola has been used in some studies that lasted up to one year. However, gotu kola has the potential to be harmful to the liver. It is best not to use gotu kola for more than 6 weeks without talking to your doctor. You may need to take a 2-week break before taking the herb again.

People with liver disease, or who take medications that affect the liver, should not take gotu kola. Ask your doctor if you take any prescription medications, or often take over-the-counter pain relievers.

Side Effects

Side effects are rare but may include skin allergy and burning sensations with external use, headache, stomach upset, nausea, dizziness, and extreme drowsiness. These tend to happen with high doses of gotu kola.

Gotu kola may interact with the following medications:

Drugs that affect the liver: Gotu kola contains things that may hurt a person's liver, and taking it along with some other medications that also can harm the liver may cause liver damage.

Diabetes medications: In animal studies, gotu kola seems to increase blood sugar levels. People with diabetes should not take gotu kola without first talking to their doctor.

Diuretics (water pills): Gotu kola seems to act like a diuretic, meaning it helps the body get rid of excess fluid. Taking diuretic medications and gotu kola could cause your body to lose too much fluid, upsetting the balance of electrolytes you need. The same is true of taking gotu kola with herbs that have diuretic effects, such as green tea, astragalus, or gingko.

Sedatives: Because gotu kola acts like a sedative, it might make some drugs taken for anxiety or insomnia stronger. The same is true for herbs taken for anxiety or insomnia, such as valerian.

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