A medicament dispenser device suitable for the delivery of medicament powder from an open blister pocket of at least one blister pack, the dispenser device comprising (a) a housing; (b) provided to said housing, an air inlet; (c) enclosed by said housing, a dispensing mechanism for the dispensing of medicament powder from an open blister pocket of at least one blister pack receivable thereby; and (d) associated with said dispensing mechanism and in communication with said air inlet, a manifold comprising (i) a body, (ii) said body defining a chimney having a chimney inlet and a chimney exit for directing airflow from said chimney inlet to said chimney exit; (iii) the body further defining a chamber having a chamber inlet and a chamber exit, (iv) wherein the chimney exit and said chamber inlet lie side-by-side each other such that when said open blister pocket of said blister pack is positioned adjacent thereto said airflow will be directed from the chimney exit to the chamber inlet via the open blister pocket to entrain said medicament powder and enable transport thereof in the airflow from the chamber inlet to said chamber exit, characterized in that, during inhaled use of the dispenser device by a patient, the airflow is drawn into the chimney of the manifold solely through the air inlet provided to the housing, wherein the air inlet provides the sole entry point for air flow into the housing during inhaled use of the dispenser device by a patient, only part of the airflow drawn through the air inlet and into the chimney of the manifold is directed via the chimney exit to the open blister pocket, and one or more bleed holes are provided between the chimney and the chamber such that a part of the airflow (the bleed airflow) will be directed into the chamber through the one or more bleed holes to disruptively impact the part of the airflow that transports the entrained medicament powder. (a) a housing; (b) provided to said housing, an air inlet; (c) enclosed by said housing, a dispensing mechanism for the dispensing of medicament powder from an open blister pocket of at least one blister pack receivable thereby; and (d) associated with said dispensing mechanism and in communication with said air inlet, a manifold comprising (i) a body, (ii) said body defining a chimney having a chimney inlet and a chimney exit for directing airflow from said chimney inlet to said chimney exit; (iii) the body further defining a chamber having a chamber inlet and a chamber exit, (iv) wherein the chimney exit and said chamber inlet lie side-by-side each other such that when said open blister pocket of said blister pack is positioned adjacent thereto said airflow will be directed from the chimney exit to the chamber inlet via the open blister pocket to entrain said medicament powder and enable transport thereof in the airflow from the chamber inlet to said chamber exit, (i) a body, (ii) said body defining a chimney having a chimney inlet and a chimney exit for directing airflow from said chimney inlet to said chimney exit; (iii) the body further defining a chamber having a chamber inlet and a chamber exit, (iv) wherein the chimney exit and said chamber inlet lie side-by-side each other such that when said open blister pocket of said blister pack is positioned adjacent thereto said airflow will be directed from the chimney exit to the chamber inlet via the open blister pocket to entrain said medicament powder and enable transport thereof in the airflow from the chamber inlet to said chamber exit,