Biyan Pian

Biyan Pian or Bi Yan Pian is a common Chinese herbal pill produced by different manufacturers. Some forms are sugar-coated. The core is typically brown. It is used in traditional Chinese medicine to "dispel wind and remove toxic heat from the nose". It is slightly aromatic in odor and bitter in taste. Ir is most often used to treat acute and chronic sinusitis and allergic rhinitis.
The ingredients of Biyan Pian vary, although most products are based on Cang Er Zi San and contain two or more ingredients from this formula. These four herbs "release the exterior", decongest the head, dry phlegm, and alleviate headache. In addition, many formulations include jie geng - Platycodon root, zhi mu - Anemarrhena asphodeloides rhizome, wu wei zi - schizandra fruit, jing jie - Schizonepeta flower and herb, lian qiao - forsythia fruit, and fang feng - Ledebouriella root.
In 2011, Health Canada issued a recall of a brand of Biyan Pian because of high levels of mercury. The levels were nearly ten times higher than the daily maximum set by Health Canada.