Microspheres are produced by contacting a solution of a macromolecule or small molecule in a solvent with an antisolvent and a counterion, and chilling the solution. The microspheres are useful for preparing pharmaceuticals, nutraceuticals, cosmetic products and the like of defined dimensions.
Compositions and methods to effect the release profile in the transdermal administration of active agents
申请人:——
公开号:US20020004065A1
公开(公告)日:2002-01-10
Compositions and methods for the transdermal delivery of active agents up to a period of seven days or more at substantially a zero-order release rate comprising a pharmaceutically acceptable adhesive matrix and a polymeric plastic material that provides a release rate regulating effect on the active agents.
Targetable diagnostic and/or therapeutically active agents, e.g. ultrasound contrast agents, comprising a suspension in an aqueous carrier liquid of a reporter comprising gas-containing or gas-generating material, said agent being capable of forming at least two types of binding pairs with a target.
Improved topical pharmaceutical compositions containing a pharmaceutically-active agent and the penetration enhancing agent 1-dodecylazacycloheptan-2-one are disclosed. This agent is used at selected levels in combination with certain C3-C4 diols or a 1-substituted azacycloalkyl-2-one. This composition provides marked transepidermal and percutaneous delivery of the selected pharmaceutically-active agent. A method of treating certain pathologies and conditions responsive to the selected active, systemically or locally, is also disclosed.
Topical pharmaceutical compositions comprising a pharmaceutically-active agent and a novel, penetration-enhancing vehicle or carrier are disclosed. The vehicle or carrier comprises a binary combination of N-(2-Hydroxyethyl) pyrrolidone and a "cell-envelope disordering compound". The compositions provide marked transepidermal and percutaneous delivery of the active selected. A method of treating certain pathologies and conditions responsive to the selected active, systemically or locally, is also disclosed.