Dry powder inhalers that inhibit agglomeration, related devices and methods

An inhaler comprising:

• an inhaler body with an inspiratory flow path therein;
• and
• at least one fin residing in the inspiratory flow path, the at least one fin comprising at least two edges that converge to define a point, the at least one turbulence promoter being configured to generate a plurality of point-induced and edge-induced flow vortices of air and dry powder in response to inspiratory effort by a user, whereby some of the flow vortices have an axis of rotation that extends in an inspiratory flow direction and some of the flow vortices have an axis of rotation that is substantially orthogonal to the inspiratory flow direction.

A method of fabricating a dry powder inhaler, comprising:

• providing an insert having at least one fin extending angularly inward from a bounding surface;
• and
• placing the insert into an inspiratory airflow path of an inhaler.

An inhaler insert, comprising an insert sized and configured for insertion into a dry powder inhaler inspiratory flow path, the insert having a plurality of spaced apart fins ramped from a bounding surface toward an axial centerline of an inhaler inspiratory flow path.