Green Jade Powder … Classic Formulas
Bi Yu San · Pulvis Biyu
Primary Actions
- Clears summer-heat and drains dampness through urination - Bi Yu San is a classical three-ingredient powder used when heat and dampness combine to cause fever, irritability, thirst, and scant dark urine.
- Cools the Blood and relieves toxicity - the addition of Qing Dai extends the base Liu Yi San strategy toward red eyes, sore mouth, sore throat, and Liver-Gallbladder heat signs.
- Helps settle heat agitation and convulsive tendency - traditional commentary includes heat stirring internally strongly enough to produce spasms or agitation.
Classic Formulas
- Bi Yu San - the source formula itself, classically dated to 1172 and built around Hua Shi, Gan Cao, and Qing Dai.
- Hao Qin Qing Dan Tang - incorporates Bi Yu San as the summer-heat and dampness-draining component in Shaoyang-Gallbladder damp-heat patterns.
- Liu Yi San - the parent formula whose Hua Shi-plus-Gan Cao core is modified by adding Qing Dai to create Bi Yu San.
Classical Text References
- Me & Qi describes Bi Yu San as a three-ingredient formula made from Hua Shi, Gan Cao, and Qing Dai whose main actions are clearing heat, cooling Blood, promoting urination, and eliminating summer-heat.
- The same formula tradition specifically links it to summer-heat with heat stagnation in the Liver and Gallbladder, especially when red eyes, sore mouth, or sore throat appear.
- Qing Dai materia medica notes Bi Yu San as a formula context for summer-heat complicated by Liver-Gallbladder fire and toxic irritation.