RIVM warns of potentially life-threatening herbs; deaths reported in the Netherlands

Dutch public health institute RIVM issued an advisory against nutritional supplements containing the herbs Huperzia serrata, Tabernanthe iboga, or Ashwagandha (Withania somnifera) because they can be harmful even when used according to the instructions on the packaging. Tabernanthe iboga, a mind-altering substance used during Bwiti Iboga ceremonies, can disrupt the heart’s rhythm and can even have a fatal outcome.

"Dozens of deaths have been reported worldwide after the use of this herb, including a few cases in the Netherlands," the RIVM said.

There were at least three deaths in the Netherlands linked to the herbs, but the RIVM could not say when those deaths occurred. Other side effects include nausea, acute psychoses, epileptic seizures, and hallucinations.

There has not been enough scientific research conducted into the damaging effects of Ashwagandha, which is used to help with stress and insomnia, but doctors have reported cases of toxicity and damage to the liver. Ashwaganda used to be used in China and India to induce an abortion. Ashwagandha is the only one of the herbs mentioned that can also be used to make tea, which is the RIVM also does not recommend.

Huperzia serrate is used to improve concentration and support the memory. It can also result in people feeling muscle weakness, stomach cramps, diarrhea, increased salivation, blurred vision, excessive tears, and symptoms of paralysis.

The herbs are also potentially harmful to an unborn baby. Anyone who is pregnant should not use any of the herbs mentioned, the RIVM emphasized.

It is not known how many people take these drugs. Products containing Huperzia serrata or Tabernanthe iboga are mainly sold online, but those containing Ashwagandha can also be found in drugstores.