Patent ID: 6844007

Claim:
A plaster comprising 10-40 wt % of a styrene-isoprene-styrene block copolymer, 5-30 wt % of a rosin-based resin, 20-70 wt % of a plasticizer, 0.01-7 wt % of 1-menthol, and 1.1-10 wt % of felbinac as a medicinally effective component, wherein said plaster does not contain a solubilizer for said felbinac, said felbinac is uniformly dispersed in a semi-solubilized state in said plaster, solubilized felbinac and microcrystalline felbinac coexist in said plaster, and said plaster has a thickness of 50-300 μm.