African herbal products to be careful with

African plant knowledge is deep and worth respecting, and much of this guide celebrates it: hibiscus, rooibos, baobab, moringa, fonio. Respect includes knowing where the danger is. The products below are sold in markets, online and in shops across Africa and its diaspora, and each has a documented record of serious harm. None of them belongs in a daily routine.

Yohimbe

Bark from a West and Central African tree, sold as a sexual-performance and weight supplement. NCCIH says there is not enough research to say it helps with any condition. Its active compound, yohimbine, has been associated with irregular heartbeat, blood pressure problems, heart attacks and seizures, and people who called poison centers about yohimbe were more likely than other callers to need medical care. Most products do not say how much yohimbine they contain, and the amount varies widely.

• Never combine it with MAO inhibitor or tricyclic antidepressants (NCCIH).
• It might be unsafe during pregnancy or breastfeeding (NCCIH).

Iboga

The root bark of Tabernanthe iboga is central to Bwiti ceremonies in Gabon, and its alkaloid ibogaine is promoted abroad for addiction. A 2026 review in Addiction describes a rare but serious risk to the heart: a prolonged QT interval and potentially fatal abnormal heart rhythms, reported at ordinary doses and in people with no known heart condition. The authors say it should be used only under medical supervision with heart monitoring. It is not something to take from a retreat, a website or a friend.

Neem oil by mouth

Neem oil is sold for use on the skin. Swallowed, it is a different matter, especially for children: a published case describes a previously healthy five-year-old with seizures that would not stop, a dangerous build-up of acid in the blood, and lasting problems with hearing, sight and balance after drinking neem oil. Keep it out of children's reach and never give it by mouth.

Impila

Impila (Callilepis laureola) is a traditional Zulu remedy made from the plant's tuber. Researchers at the University of the Witwatersrand describe it as able to cause sudden, fatal destruction of the liver, especially in children, from compounds that shut down the cell's energy supply. Do not use it, and do not give it to a child.

Herbal "sexual enhancement" products that hide real drugs

The FDA warns that products sold for sexual enhancement, male energy or stamina are likely to contain dangerous hidden ingredients. The problem is documented in Africa too: of 40 herbal aphrodisiac products bought from vendors in Mwanza, Tanzania, 25 contained sildenafil, tadalafil or both, the active drugs in prescription erectile medicines, and two held more sildenafil than the maximum daily dose. The FDA says such products pose a serious health risk and can lead to severe health problems and hospitalization, and the person taking one has no way to know what is in it.

Traditional medicines alongside HIV or TB medicines

Sutherlandia (cancer bush) is widely used by people living with HIV in South Africa. In a 24-week randomized trial, it did not change viral load or CD4 count, and the group taking it had more days of infection, including two cases of tuberculosis in people also taking the TB medicine isoniazid. The researchers call for more study of a possible interaction. If you take HIV or TB medicines, tell your clinic about every traditional product you use.

Artemisia tea for malaria

Artemisia annua is the source of artemisinin, the backbone of modern malaria medicine. That is exactly why the plant itself is the wrong choice. WHO does not support using Artemisia plant material in any form for malaria: the amount of active compound in teas and powders varies widely and is often too low to clear the parasites, and widespread use could speed up resistance to the medicines that work. Effective, affordable malaria medicines exist; get tested and use them.