A medication inhalation apparatus preferably formed of a single, unitary sheet of stock, includes an outer housing, movable between collapsed and expanded states, encompassing a first volume. An inner housing within the outer housing encompasses an inner or second volume. An inhaler opening to the first volume is within a wall of the outer housing at a first location. A mouth opening to the inner volume is within a wall of the outer housing and the inner housing at a second location. A one-way inhalation valve connecting the first volume and the inner volume is within a wall of the inner housing. A one-way exhalation valve connecting the inner volume and the exterior of the outer housing is within a wall of the outer housing and inner housing at a third location. The valve preferably includes an elongated spring body formed of a semi-pliant material with a strength and rigidity providing limited flexibility. A first separation is perpendicular to the elongate axis of the spring body, and extends from a first edge of the spring body across at least a portion of a width of the spring body. A second separation perpendicular to the elongate axis of the spring body extends from a second edge of the spring body across at least a portion of the width of the spring body.L'invention concerne un appareil d'inhalation de médicament formé de préférence d'une seule feuille unitaire de matière, comprenant un boîtier externe, mobile entre des états écrasé et déployé, comprenant un premier volume. Un boîtier interne à l'intérieur du boîtier externe comprend un volume interne ou second volume. Une ouverture d'inhalateur menant au premier volume est ménagée à l'intérieur d'une paroi du boîtier externe à un premier emplacement. Une ouverture d'embouchure menant au volume interne est ménagée à l'intérieur d'une paroi du boîtier externe et du boîtier interne à un deuxième emplacement. Une soupape d'inhalation unidirectionnelle reliant le premier volume et le volume interne se trouve à l
