A dry powder inhaler for delivering medicament from at least one blister pack, each blister pack having a plurality of spaced-apart blister pockets containing doses of the medicament, the inhaler comprising: a housing for accommodating unused and used portions of the at least one blister pack together with a dispensing mechanism for simultaneously opening at least two blister pockets at a time; and a manifold component through which air can be drawn in use of the inhaler, wherein the manifold component comprises: first and second air inlet openings (51a, 51b) for receiving external air; a first air outlet opening for providing the external air to a first opened blister pocket and a first medicament inlet opening for receiving air-entrained medicament from the first opened blister pocket, the first air outlet opening and the first medicament inlet opening being arranged side-by-side to enable simultaneous communication with the first opened blister pocket; a second air outlet opening for providing the external air to a second opened blister pocket and a second medicament inlet opening for receiving air-entrained medicament from the second opened blister pocket, the second air outlet opening and the second medicament inlet opening being arranged side-by-side to enable simultaneous communication with the second opened blister pocket; and a medicament outlet opening for delivery of the air-entrained medicament from the first and second opened blister pockets to the user, the first and second medicament inlet openings being fluidly connected to the medicament outlet opening by a medicament delivery conduit formed in the manifold component, characterised in that the first and second air inlet openings (51a, 51b) are fluidly connected to the first and second air outlet openings (63a, 63b) by respective first and second air conduits (53a, 53b), wherein the air conduits (53a, 53b) are separately provided so that the external air from each of the first and second air inlet openings (51a, 51b) does not mix with the external air from the other of the first and second air inlet openings (51b, 51a) before reaching the opened blister pocket. a housing for accommodating unused and used portions of the at least one blister pack together with a dispensing mechanism for simultaneously opening at least two blister pockets at a time; and a manifold component through which air can be drawn in use of the inhaler, wherein the manifold component comprises: first and second air inlet openings (51a, 51b) for receiving external air; a first air outlet opening for providing the external air to a first opened blister pocket and a first medicament inlet opening for receiving air-entrained medicament from the first opened blister pocket, the first air outlet opening and the first medicament inlet opening being arranged side-by-side to enable simultaneous communication with the first opened blister pocket; a second air outlet opening for providing the external air to a second opened blister pocket and a second medicament inlet opening for receiving air-entrained medicament from the second opened blister pocket, the second air outlet opening and the second medicament inlet opening being arranged side-by-side to enable simultaneous communication with the second opened blister pocket; and a medicament outlet opening for delivery of the air-entrained medicament from the first and second opened blister pockets to the user, the first and second medicament inlet openings being fluidly connected to the medicament outlet opening by a medicament delivery conduit formed in the manifold component, first and second air inlet openings (51a, 51b) for receiving external air; a first air outlet opening for providing the external air to a first opened blister pocket and a first medicament inlet opening for receiving air-entrained medicament from the first opened blister pocket, the first air outlet opening and the first medicament inlet opening being arranged side-by-side to enable simultaneous communication with the first opened blister pocket; a second air outlet opening for providing the external air to a second opened blister pocket and a second medicament inlet opening for receiving air-entrained medicament from the second opened blister pocket, the second air outlet opening and the second medicament inlet opening being arranged side-by-side to enable simultaneous communication with the second opened blister pocket; and a medicament outlet opening for delivery of the air-entrained medicament from the first and second opened blister pockets to the user, the first and second medicament inlet openings being fluidly connected to the medicament outlet opening by a medicament delivery conduit formed in the manifold component, characterised in that the first and second air inlet openings (51a, 51b) are fluidly connected to the first and second air outlet openings (63a, 63b) by respective first and second air conduits (53a, 53b), wherein the air conduits (53a, 53b) are separately provided so that the external air from each of the first and second air inlet openings (51a, 51b) does not mix with the external air from the other of the first and second air inlet openings (51b, 51a) before reaching the opened blister pocket.