Side effects of Arnica Extract

Arnica Extract is possibly safe when used in the amounts commonly found in food or when applied to unbroken skin short-term. The Canadian government, however, is concerned enough about the safety of Arnica Extract to prohibit its use as a food ingredient.
In fact, Arnica Extract is considered poisonous and has caused death. When taken by mouth it can also cause irritation of the mouth and throat, stomach pain,vomiting, diarrhea, skin rashes, shortness of breath, a fast heartbeat, an increase inblood pressure, heart damage, organ failure, increased bleeding, coma, and death.
Arnica Extract is often listed as an ingredient in homeopathic products; however, these products are usually so dilute that they contain little or no detectable amount of Arnica Extract.