Powder inhaler

A powder inhaler, comprising:

• a casing having a mouthpiece and housing an inhalation channel connected to an opening of the mouthpiece;
• a container for storing a powdered medicament, the container being placed in the casing;
• a dispensing device placed in the casing and configured to dispense unit doses of the powdered medicament from the container to the inhalation channel for inhalation through the mouthpiece;
• and
• a cover engageable with the casing to close the opening of the mouthpiece;
• wherein
• the cover comprises a sealing element;
• the sealing element comprises a material that is more deformable than a material of the mouthpiece;
• when the cover is engaged with the casing and closes the mouthpiece, a main portion of the sealing element is coupled to the opening to tight close said opening;
• the casing has at least one air inlet in fluid communication with the inhalation channel to allow air intake at least when the user inhales through the mouthpiece;
• when the cover is engaged with the casing and closes the mouthpiece, an auxiliary portion of the sealing element is coupled to the at least one air inlet to tight close said at least one air inlet;
• and
• the material of the sealing element is more deformable than a material of the casing.