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US 5,204,119 AGranted
External preparation comprising calcium silicate
OwnerTakao Shiobara, Jun Nonaka +2inventors
InventorsTakao Shiobara, Jun Nonaka, Masayoshi Kasai, Takeshi Konita
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Abstract
An external preparation is characterized by comprising calcium silicate. The calcium silicate controls the release rate and percutaneous absorbability of a drug.
Claims7
An external preparation comprising calcium silicate in the form of a porous powder and a drug adsorbed thereon, said calcium silicate having a gyrolite crystal structure having the formula 2CaO.multidot.3SiO.sub.2 .multidot.mSiO.sub.2 .multidot.nH.sub.2 O, with 1<m<2 and 2<n<3 and is contained in the preparation in an amount of from 1 to 120 percent by weight based on the weight of the drug.
Dependencies are inferred from the claim text.