A respiratory circuit 
inhalation apparatus is adapted to communicate a fluid 
stream between at least one air source and a patient and is formed with at least one central body portion defining an interior fluid 
stream communication passageway. An integrally formed 
dual function mouthpiece and 
effluent port projects from an end of the central body to communicate the fluid 
stream between the air source and a portion of the respiratory circuit that can lead to the patient or other components of the respiratory circuit. An integrally formed ambient fluid port is also formed as part of the 
inhalation apparatus that projects from the central body portion opposite to the 
dual function port. As with the other ports, the ambient fluid port also communicates the fluid stream between the interior fluid passageway and the at least one air source. The preferred 
inhalation apparatus also further includes a medication port that is formed about the central body portion and which includes a baffle or baffle portion that projects into and terminates within the interior fluid passageway. The terminus orifice and 
exit plane of the baffle preferably projects and terminates within the interior fluid passageway beyond the surface thereof so that liquids pooled within the passageway can be retained therein without draining into the medication port. Any or all of the various ports can be configured to be compatible for use with industry preferred respiratory circuit components and rigid and deformable 22 
millimeter tubes.