The invention relates to medicine, in particular to development of high effective pharmaceutical preparations for inhalation therapy. Solution for preparing preparation for inhalation administration contains as active substance combination of benzyldimethyl [3 - (myristoilamino) propyl] ammonium chloride and broncholytic agent. Use preparation for treatment and/or prophylaxis of infectious - inflammatory diseases of upper respiratory tracts (laringit, tracheitis, pharyngitis, tonsillitis and T. d.), as well as pulmonary diseases and bronchi (pneumonia and bronchitis) different of bacterial etiology (bacteria, fungi, viruses and to select). Agent will be drained in the form of nonsterile or sterile solution or concentrate for of preparing preparation for inhalation administration, designed for use in different types of inhalers/nebulaizerov (ultrasonic and compressor). Curative and/or prophylactic effect is achieved by virtue of the combination of physical factors (finely dispersed spraying, ultrasound), and also pharmacotherapeutic properties of ingredients, of the composition.