There is no such thing as the toxicity of Prepared Shouwu. Prepared Shouwu generally refers to Prepared He Shouwu, modern medicine has proved that Prepared He Shouwu contains the toxic component anthraquinones, which can cause gastrointestinal symptoms such as nausea, abdominal pain, diarrhea, vomiting, etc. Prolonged use may cause damage to liver and kidney functions. Prepared He Shou Wu is a kind of traditional Chinese medicine, for He Shou Wu’s concocted processed products, taste bitter, sweet, astringent, warm, attributed to the liver, heart, kidney meridian. It is effective in tonifying the liver and kidney, benefiting the essence and blood, in addition to strengthening the tendons and bones. It is useful in treating blood deficiency, vertigo and tinnitus, numbness of the limbs, disintegration (excessive or spotty menstruation), and subluxation of the belt. It is contraindicated for those who exhibit distension and pain in both sides of the body and poor digestion, especially raw He Shou Wu. This product should not be used alone in cases of yang failure and deficiency of cold (Yang Qi weakening with fear of cold as the main symptom). Prepared He Shou Wu may cause gastrointestinal discomfort. This product is contraindicated in cases of dampness-phlegm congestion (phlegm-dampness evil qi is more powerful in the body). Before taking this medicine, you need to be guided by a doctor for identification of symptoms and should not take the medicine on your own to avoid adverse effects on the body.