Dispenser for the discharge of pharmaceutical fluids with the following features: a. the dispenser comprises an elongate housing which is oriented along a centre axis, and b. a discharge opening which is oriented axially in the direction of the centre axis is provided at the distal end of the housing, and c. the dispenser comprises a fluid reservoir, and d. the dispenser comprises a control device with a pump or a switching valve, which control device is connected by way of a first line to the fluid reservoir and by way of a second line to the discharge opening, and by means of which control device fluid can be conducted from the fluid reservoir to the discharge opening, and e. the dispenser comprises an actuating pushbutton which is provided laterally in a recess of a shell face of the housing and which is connected to the control device in such a way that radial pressing in of the actuating pushbutton in the direction of the centre axis actuates the control device, with the result that fluid is conducted to the discharge opening, characterized by the following features: f. the dispenser comprises a detachable cap which, in the placed-on state, covers the discharge opening and can be detached from the housing in the direction of the centre axis towards the distal end, and g. the cap and the housing have interacting fixing elements (36, 82; 44, 88) which, in a relative engagement position, prevent the detaching of the cap from the housing, and, by way of - rotating of the cap about the centre axis and subsequent deformation of the cap, or - deforming of the cap and subsequent rotating of the cap about the centre axis, or - deforming of the cap and subsequent relative moving of a housing section of the housing, on which the fixing element is provided, with respect to the shell face of the housing, can be moved into a relative release position, in which they do not counteract the detaching of the cap. a. the dispenser comprises an elongate housing which is oriented along a centre axis, and b. a discharge opening which is oriented axially in the direction of the centre axis is provided at the distal end of the housing, and c. the dispenser comprises a fluid reservoir, and d. the dispenser comprises a control device with a pump or a switching valve, which control device is connected by way of a first line to the fluid reservoir and by way of a second line to the discharge opening, and by means of which control device fluid can be conducted from the fluid reservoir to the discharge opening, and e. the dispenser comprises an actuating pushbutton which is provided laterally in a recess of a shell face of the housing and which is connected to the control device in such a way that radial pressing in of the actuating pushbutton in the direction of the centre axis actuates the control device, with the result that fluid is conducted to the discharge opening, f. the dispenser comprises a detachable cap which, in the placed-on state, covers the discharge opening and can be detached from the housing in the direction of the centre axis towards the distal end, and g. the cap and the housing have interacting fixing elements (36, 82; 44, 88) which, in a relative engagement position, prevent the detaching of the cap from the housing, and, by way of - rotating of the cap about the centre axis and subsequent deformation of the cap, or - deforming of the cap and subsequent rotating of the cap about the centre axis, or - deforming of the cap and subsequent relative moving of a housing section of the housing, on which the fixing element is provided, with respect to the shell face of the housing, can be moved into a relative release position, in which they do not counteract the detaching of the cap. - rotating of the cap about the centre axis and subsequent deformation of the cap, or - deforming of the cap and subsequent rotating of the cap about the centre axis, or - deforming of the cap and subsequent relative moving of a housing section of the housing, on which the fixing element is provided, with respect to the shell face of the housing,