To improve administration of powdered pharmaceuticals, a pharmaceutical powder cartridge (1) for powder inhalers for holding a pharmaceutical depot for a large number of pharmaceutical powder doses is proposed, having at least one storage space (6) and an integrated metering device, said integrated metering device comprising at least one metering slide (9, 13, 14) which can be moved approximately transversely in a metering slide channel (12) at least from a filling position to an emptying position, approximately transversely with respect to the direction of flow of the pharmaceutical powder out from the at least one storage space (6), said metering slide channel (12) with the at least one metering slide (9, 13, 14) being sealed off from the environment at least in the filling position of the metering slide (9, 13, 14), and also further measures and a corresponding inhaler.