Objective:To optimize matrix formulation of Sanhuang Sanyu cataplasm. Method: Taking appearance and adhesion of cataplasm as evaluation indexes,matrix formulation of Sanhuang Sanyu cataplasm was optimized by single factor test and orthogonal test. Result: Optimized matrix formulation of Sanhuang Sanyu cataplasm was NP-700-K90-glycerol(0.5∶0.4∶6).0.02 g·mL-1 solution was received by adding carbomer-u10NF into mixed extraction concentrated liquid of Rheum palmatum and Scutellaria baicalensis,swelling overnight, as A phase,0.5 g sodium polyacrylate and 0.4 g PVP were added to 6 g glycerol as B phase,aluminum chloride and citric acid were added to water as C phase,single extraction concentrated liquid of Phellodendron chinense was as D phase,four phases was fully mixed with A-B-C-D(10∶3∶3∶5), stirred 15 min, coating,covered with anti-sticking layer. Conclusion: Optimized matrix formulation of Sanhuang Sanyu cataplasm was simple,stable and feasible,which could be applied to industrial production.
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