It refers to a pharmacodynamic synthesis in aerosols, which is used to measure the pressure inhaler, including: (a) brominated glycerin with a dose of 5-26 mg; (b) formaldehyde, salt or salt solution with a dose of 1-25 UG; (c) a A propellant consisting of hydrofluorocarbons; (d) a sewing agent; and (E) a mineral anhydride as an effective amount of stabilizer. The composition is contained in an aerosol container, which has a dosage valve and at least a pudding rubber tube. In one preferred aspect, the mineral anhydrides are hydrochloric acid 1m,The stabilizer content is between 0.15 and 0.28 μ g / L, while the cosmetics are ethanol. On the other hand, this component may include one or more active pharmaceutical components, selected from β - 2 agonists; corticosteroids used for inhalation (dibutyric acid of beclomethasone, Ferdinand, propionic acid of fluticasone, trimethylquinolone, prednisone, etc.);Corrosion inhibitors and phosphoric acid-4 inhibitors. Storing this component in an aerosol container with the above dosage valve minimizes its degradation products (especially DP3) during shelf life, even when stored in severe cold and humidity conditions below the detection threshold.Se refiere a una composicion farmaceutica en solucion para aerosol para utilizar con un inhalador presurizado de dosis medida, que comprende: a) bromuro de glicopirronio con una dosificacion entre 5 y 26 ug por accionamiento; b) formoterol, o una sal del mismo o un solvato de dicha sal, con una dosificacion entre 1 y 25 ug por accionamiento; c) un propelente que consiste en un HFA; d) un cosolvente; y e) un acido mineral como estabilizante en una cantidad util. Dicha composicion esta contenida en un envase de aerosol provisto de una valvula dosificadora que tiene por lo menos una junta de caucho butilico. En un aspecto preferido, el acido mineral es acido clorhidrico 1M, en una cantidad entre 0,15 y 0,28 ug/ul como estabilizante; y el cosolvente es etanol. En otro aspecto, dicha composici