Spray-dried powder formulation (Q) comprises particles comprising components of (a) hydroxy-di-thiophen-2-yl-acetic acid (4R,5S,7S)-9,9-dimethyl-3-oxa-9-aza-tricyclo[3.3.1.02,4]non-7-yl ester compound (I) (b) at least one embedding material of mono or disaccharides, oligosaccharides, polymers, sugar alcohols or cholesterol and (c) an organic, physiologically acceptable, sterically demanding acid of ascorbic acid, a fruit or culinary acid and mono, di or trivalent carbonic acid with exception of amino carboxylic acids. Spray-dried powder formulation (Q) comprises particles comprising components of (a) hydroxy-di-thiophen-2-yl-acetic acid (4R,5S,7S)-9,9-dimethyl-3-oxa-9-aza-tricyclo[3.3.1.0(2,4)]non-7-yl ester compound of formula (I) (b) at least one embedding material of mono or disaccharides, oligosaccharides, polymers, sugar alcohols or cholesterol and (c) an organic, physiologically acceptable, sterically demanding acid of ascorbic acid, a fruit or culinary acid and mono, di- or trivalent carbonic acid with exception of amino carboxylic acids. X ->a negatively charged anion, preferably chloride, bromide (preferred), iodide, sulfate, phosphate, methanesulfonate, nitrate, maleate, acetate, citrate, fumarate, tartrate, oxalate, succinate, benzoate or p-toluenesulfonate. An independent claim is included for a method for preparing (Q) containing particles comprising providing a solution of components (a)-(c) in a suitable solvent, spraying the solution in a hot air current, drying the sprayed solution to form a powder containing particle and separating the powder by cyclone or filter. [Image] [Image] ACTIVITY : Respiratory-Gen Antiasthmatic. No biological data given. MECHANISM OF ACTION : None given.
