Inhalation device for use in aerosol therapy

An inhalation device comprising a base unit, a mouthpiece, and an aerosol head, wherein:

• (a) the base unit comprises:
• one or more air inlet opening(s)
• an air outlet opening,
• a groove for receiving the mouthpiece, and
• one or more key lock member(s);
• (b) the mouthpiece comprises:
• a first segment, comprising
• an air inlet opening connectible with the air outlet opening of the base unit, and
• a lateral opening for receiving an aerosol generator,
• the first segment being insertable into the groove of the base unit, and
• a second segment downstream of the first segment, comprising an aerosol outlet opening;
• and
• (c) the aerosol head comprises:
• an aerosol generator,
• a reservoir for a liquid,
• one or more key lock member(s) complementary to the key lock member(s) of the base unit;
• and
• wherein the base unit, the mouthpiece and the aerosol head are connectible with one another;
• and
• wherein the aerosol generator is positioned in the aerosol head in such a way that when engaging the member(s) of the key lock with the complementary member(s), the aerosol generator is at least partially inserted into the lateral opening of the first segment of the mouthpiece.