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The purpose of the experiment was to formulate and characterize the dry powder inhalation (DPI) formulation of liposomally entrapped anti-asthmatic drug, Ketotifen fumarate (KF). Liposomes composed of saturated egg phosphatidyl choline (EPC) and cholesterol (CHOL) were prepared by lipid film hydration and sonicated to have the desired size (<5 μm). Process variable such as vacuum, presonication...
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