POWDER INHALER, consisting of: - a dry powder inhaler for use with capsule which works in a horizontal position - base housing with upper and lower half part, wherein its cross section is oval and hollow; - a capsule receptacle mounted pivotally within the lower half part of the base housing together with a lid and means to be pivoted outwards and expose its cradle for a capsule housing containing powdered inhalant medication, and means for such capsule receptacle to return to the initial position aligned with the longitudinal axis of the base housing; - a moveable mouthpiece affixed on the upper part of the base housing, with this mouthpiece having a cap on the outside, and having on the lower side of that moveable mouthpiece lateral stems slidably coupled to tubular vertical guide, wherein said mouthpiece is movable downwardly or outwardly in combination with helical springs (8 and 9), in which the first movement is realized by manual pressure that exceeds the strength of the springs, and the return movement is due to the force of this helical springs (8 and 9); - a perforation device for opening the capsule, affixed to the inner side of the mouthpiece, wherein the perforation device being moved together with the mouthpiece, also has means consisting of a pair of vertical needles whose lower sharp points are positioned to radially perforate the ends of the capsule forming small openings for the outflow of the powdered medication; - a flow guide tube, centralized and housed on the inner side of the mouthpiece and the guide, with the upper edge ending within said mouthpiece, adjusted by a flange, while the lower part has a sieve-like structure forming the roof of a de-agglomeration chamber formed above the cradle for the capsule, wherein between said de-agglomeration chamber and the upper edge of the mouthpiece a vertical passage is formed for the main air flow and the medication; and said de-agglomeration chamber has a tangential secondary air intake point positioned between the walls of the capsule receptacle and the base housing which in turn has one or two primary air intake points, with a air pocket; characterized by the fact that that it includes one or more false air passage, apart from the passage and that provide an additional air flow of aspiration that is formed with the air captured in the air pocket and that moves into the inhaler by the primary air inlets, this additional air flow rises concurrently with the main air flow that conducts the medication from the de-agglomeration chamber and, in the mouthpiece portion, the additional flow is mixed with the main inhalation flow. - a dry powder inhaler for use with capsule which works in a horizontal position - base housing with upper and lower half part, wherein its cross section is oval and hollow; - a capsule receptacle mounted pivotally within the lower half part of the base housing together with a lid and means to be pivoted outwards and expose its cradle for a capsule housing containing powdered inhalant medication, and means for such capsule receptacle to return to the initial position aligned with the longitudinal axis of the base housing; - a moveable mouthpiece affixed on the upper part of the base housing, with this mouthpiece having a cap on the outside, and having on the lower side of that moveable mouthpiece lateral stems slidably coupled to tubular vertical guide, wherein said mouthpiece is movable downwardly or outwardly in combination with helical springs (8 and 9), in which the first movement is realized by manual pressure that exceeds the strength of the springs, and the return movement is due to the force of this helical springs (8 and 9); - a perforation device for opening the capsule, affixed to the inner side of the mouthpiece, wherein the perforation device being moved together with the mouthpiece, also has means consisting of a pair of vertical needles whose lower sharp points are positioned to radially perforate the ends of the capsule forming small openings for the outflow of the powdered medication; - a flow guide tube, centralized and housed on the inner side of the mouthpiece and the guide, with the upper edge ending within said mouthpiece, adjusted by a flange, while the lower part has a sieve-like structure forming the roof of a de-agglomeration chamber formed above the cradle for the capsule, wherein between said de-agglomeration chamber and the upper edge of the mouthpiece a vertical passage is formed for the main air flow and the medication; and said de-agglomeration chamber has a tangential secondary air intake point positioned between the walls of the capsule receptacle and the base housing which in turn has one or two primary air intake points, with a air pocket;