abstract |
Inhalatory pharmaceutical composition comprising a drug, a soluble excipient and a surfactant, characterized by: said soluble excipient is present in an amount between 10% and less than 100% by weight; —the weight ratio between said surfactant and said drug is between 0.01 and 10; —the particle size of at least 50% of the particles of said powder is below 5 μm; —the bulk density d b of said powder is between 0.1 and 0.3 g/cc; —the tapped density d t of said powder is between 0.15 and 0.7 g/cc; —the ratio d b /d t is between 0.2 and 0.65. |