Numerous homeopathic drugs contain potentially harmful ingredients. As recently as September 2017, a homeopathic drug facility received a Warning Letter, citing failure to establish adequate in-process controls for products containing multiple potentially toxic ingredients. One such ingredient was Nux vomica, a plant bearing constituents commonly used for rat poison.
Throughout 2017, FDA issued at least four additional letters to homeopathic drug manufacturers who failed to adequately test and control potentially toxic substances in their products. FDA charged the drugs in question as adulterated.
