Aerosol carriers
AssigneeBritish Technology Group Limited
InventorsDavid Ganderton, Nuha M. Kassem
Life of this patent
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Abstract
Pharmaceutical excipients useful in dry powder inhalents comprise particles having a rugosity (measured by air permeametry) of less than 1.75. The use of these carriers increases the amount of drug injested by the patient using a dry powder inhaler. The preferred excipients are crystalline sugars such as lactose which may conveniently be prepared by controlled crystallisation from an aqueous medium.
Claims7
A crystalline particulate carrier suitable for use in dry powder inhaler compositions, wherein said carrier is a saccharide selected from the group consisting of a monosaccharide, a dissaccharide and a polysaccharide and having an average particle size of from 5.0 to 1000 microns and a rugosity as measured by air permeametry of less than 1.75.
Dependencies are inferred from the claim text.