It is also used in modern medicine in the treatment of certain skin conditions including head lice, scabies. This chemical was detected only in two products made in Thailand and labeled in Thai. This herb is usually external application, and in very small doses internally, for short periods of time. Patent formulas with high levels of lead probably contain Qian Dan as an ingredient. Those with low levels may contain lead that has been leached from the soil by herbs.
Larger doses paralyze the muscles.
Serious toxicity has been recorded with use of over 50 mg of this fruit. This herb should always be used with caution. This is a representative list of chemicals found in Chinese products tested by the California FDB, including every chemical found in more than one product tested. It does not include all of the chemical constituents of herbs reported in the 1997-98 Compendium of Asian Patent Medicines. The following table includes chemicals that are in fact contaminants that may cause problems for patients.