Formulation for spray-drying large porous particles

   
   

Particles having a tap density less than about 0.4 g/cm3 are formed by spray drying from a colloidal solution including a carboxylic acid or salt thereof, a phospholipid, a divalent salt and a solvent such as an aqueous-organic solvent. The colloidal solution can also include a therapeutic, prophylactic or diagnostic agent. Preferred carboxylic acids include at least two carboxyl groups. Preferred phospholipids include phosphatidylcholines, phosphatidylethanolamines, phosphatidylglycerols, phophstidylserines, phosphatidylinositols and combinations thereof. The particles are suitable for pulmonary delivery.

As partículas que têm uma densidade da torneira mais menos do que aproximadamente 0.4 g/cm3 são dadas forma pela secagem de pulverizador de uma solução colloidal including um ácido carboxylic ou um sal disso, um phospholipid, um sal divalent e um solvente tal como um solvente aqueous-orgânico. A solução colloidal pode também incluir um agente therapeutic, prophylactic ou diagnóstico. Os ácidos carboxylic preferidos incluem ao menos dois grupos carboxyl. Os phospholipids preferidos incluem phosphatidylcholines, phosphatidylethanolamines, phosphatidylglycerols, phophstidylserines, phosphatidylinositols e combinações disso. As partículas são apropriadas para a entrega pulmonary.

 
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