The invention relates to a discharge unit (10, 250) for discharging pharmaceutical media from a medium storage (80) having a first discharge opening (260), a pump (26, 32), an inlet channel (24) for connecting the medium storage (80) to the pump (26, 32), and having an outlet channel (36, 264) for connecting the pump (26, 32) to the first discharge opening (260). The first discharge opening (260) is part of a first subassembly (250) of the discharge unit, and the pump (26, 32), at least a segment (36) of the outlet channel (36) and an outlet valve (42, 44) provided in the outlet channel (36), is part of a second subassembly (10) of the discharge unit, wherein the first subassembly (250) is configured such that it can be coupled to the second subassembly (10), and can be decoupled therefrom, without the need for tools. An inner volume of a segment of the outlet channel extending from the outlet valve (42, 44) to the first discharge opening (260) is smaller than 15 µl.
