A drug mixing device is disclosed. The drug mixing device comprises a transfer member, comprising an aperture for dispensing a fluid, wherein the fluid is a first component of a drug to be mixed. The drug mixing device also comprises a container for containing a second component of the drug to be mixed, the container comprising a surface. The aperture is configured to determine the initial direction of the velocity of the fluid dispensed through the aperture and further configured to direct the dispensed fluid towards the surface. The aperture and the surface are arranged relative to each other to cooperate such that, in use, substantially all of the dispensed fluid initially encounters the surface at an oblique angle.
