The invention provides compositions, solvent systems, and methods for solubilizing compounds which are otherwise difficult to solubilize. The invention involves the use of a structured fluid (e.g. a liquid crystalline phase, an L1 phase, an L2 phase, an L3 phase, an emulsion, or a microemulsion), comprising a polar solvent, a lipid or a surfactant, and an essential oil or a dissolution/solubilization agent.
A particle is disclosed that comprises a first volume of hydrophobe-rich material with tunable dissolution and solubilization characteristics and a distinct second volume of nanostructured nonlamellar liquid crystalline material, said second volume containing said first domain and being capable of being in equilibrium with said first volume. Preferably, the nanostructured nonlamellar liquid crystalline material is capable of being in equilibrium with a polar solvent or a water-immiscible solvent or both.
Drug-delivery vehicles based on reversed liquid crystalline phase materials
申请人:Lyotropic Therapeutics, Inc.
公开号:EP2264126A2
公开(公告)日:2010-12-22
Uncoated particles of reversed cubic phase or reversed hexagonal phase material containing an active disposed within are provided. The uncoated particles have an ionic charge that is sufficient to stabilize them in dispersion in a liquid, e.g. a polar solvent. The active that is disposed within the particles may be, for example, a pharmaceutical or nutriceutical compound. The invention also contemplates drug formulations containing reversed hexagonal and reversed cubic phases that can be applied to significantly increase the duration of action of the drug and/or provide the same duration and efficiency at a significantly lower dose.
Formulations for delivery via pressurised metered dose inhalers
申请人:SCHOOL OF PHARMACY, UNIVERSITY OF LONDON
公开号:EP2364696A1
公开(公告)日:2011-09-14
A formulation suitable for delivery from a pressurised metered dose inhaler comprises a hydrofluoroalkane liquid, which is pharmaceutically acceptable, for instance HFA 134a or HFA 227, a drug to be delivered to the lung which is insoluble in the hydrofluoroalkane, the drug being in particulate form in the composition, further containing a suspension stabiliser which is a non-toxic essential oil miscible with the hydrofluoroalkane liquid at room temperature. The essential oil is preferably one having some amphiphilic property, such as a ketone or aldehyde compound. Insulin may be formulated for inhalation.
Reversed liquid crystalline phases with non-paraffin hydrophobes
申请人:——
公开号:US20040022820A1
公开(公告)日:2004-02-05
Compounds which are otherwise difficult to solubilize, such as, for example, pharmaceutical actives difficult for the body to absorb, are solubilized into a composition using a solvent system that is a structured fluid. The structured fluid is a reversed cubic phase or reversed hexagonal phase material, or a combination thereof, which includes a polar solvent, a surfactant and a non-paraffinic liquid with a high octanol-water partition coefficient which does not qualify as a surfactant. The compositions thus formed are able to enhance absorption of drugs by the induction of local, transient nanopores in biomembrane absorption barriers and particularly those in which efflux mechanisms, such as those associated with P-glycoprotein and/or cytochrome 3A4, are active. The compositions and methods that are used for solubilizing pharmaceutical actives in structured fluids can simultaneously accomplish solubilization of difficultly soluble drugs and enhancement of absorption.
在其他方面难以溶解的化合物,例如人体难以吸收的药物活性物质,可使用结构流体溶剂系统溶解到组合物中。结构液是一种反向立方相或反向六方相材料,或其组合,其中包括极性溶剂、表面活性剂和辛醇-水分配系数较高但不属于表面活性剂的非石蜡液体。这样形成的组合物能够通过诱导生物膜吸收屏障中的局部、瞬时纳米孔,特别是那些外排机制(如与 P 糖蛋白和/或细胞色素 3A4 相关的机制)活跃的屏障,促进药物的吸收。用于在结构液中增溶药物活性成分的组合物和方法可同时实现难溶性药物的增溶和促进吸收。