Patent ID: 8834931
Filing Date: 2014-09-16
Classification: A61K,A61P

Abstract:
1. A dry powder formulation containing 0.001% to 1% of tiotropium by weight as blended with a physiologically acceptable excipient characterized in that said excipient is comprised of the blend of a finer excipient with an average particle size of 7 to 10 μm, a coarser excipient with an average particle size of 35 to 45 μm, and a much coarser excipient with an average particle size of 85 to 95 μm and the amount of the finer excipient is in the range of 17% to 20% by weight of the total amount of the dry powder formulation, wherein the amount of the coarser excipient is in the range of 50% to 70% by weight of the total amount of the dry powder formulation.