A valve for administration of two or more drug fluids, such as cytostatics, comprising: a valve housing having: - an inner circumferential surface, - a plurality of drug inlets (D1 to D4) for receiving said drug fluids and fluidly connected to associated drug outlets arranged at the inner circumferential surface of the housing, and - one flushing inlet for receiving a flushing fluid, such as a neutral fluid, and fluidly connected to one or more flushing outlets arranged at the inner circumferential surface of the housing; and a valve member having a rotational axis and provided with a passageway (320; 321) presenting a single inlet arranged at an outer circumferential surface of the valve member and a single outlet arranged coaxially with said rotational axis; wherein the valve is arranged such that the valve member can be rotated into: - a plurality of drug positions in each of which the single passageway inlet is fluidly connected to a respective one of said drug outlets for guiding an associated drug fluid via a flow path defined by said passageway (320; 321) to said passageway outlet, and - one or more flushing positions in which the single passageway inlet is fluidly connected to a respective one of said one or more flushing outlets for guiding said flushing fluid through the same flow path defined by said passageway (320; 321) in order to flush said passageway from any drug residuals, and wherein the valve member is prevented from rotating from one drug position to another drug position without passing one of said flushing positions. a valve housing having: - an inner circumferential surface, - a plurality of drug inlets (D1 to D4) for receiving said drug fluids and fluidly connected to associated drug outlets arranged at the inner circumferential surface of the housing, and - one flushing inlet for receiving a flushing fluid, such as a neutral fluid, and fluidly connected to one or more flushing outlets arranged at the inner circumferential surface of the housing; and - an inner circumferential surface, - a plurality of drug inlets (D1 to D4) for receiving said drug fluids and fluidly connected to associated drug outlets arranged at the inner circumferential surface of the housing, and - one flushing inlet for receiving a flushing fluid, such as a neutral fluid, and fluidly connected to one or more flushing outlets arranged at the inner circumferential surface of the housing; and a valve member having a rotational axis and provided with a passageway (320; 321) presenting a single inlet arranged at an outer circumferential surface of the valve member and a single outlet arranged coaxially with said rotational axis; wherein the valve is arranged such that the valve member can be rotated into: - a plurality of drug positions in each of which the single passageway inlet is fluidly connected to a respective one of said drug outlets for guiding an associated drug fluid via a flow path defined by said passageway (320; 321) to said passageway outlet, and - one or more flushing positions in which the single passageway inlet is fluidly connected to a respective one of said one or more flushing outlets for guiding said flushing fluid through the same flow path defined by said passageway (320; 321) in order to flush said passageway from any drug residuals, and - a plurality of drug positions in each of which the single passageway inlet is fluidly connected to a respective one of said drug outlets for guiding an associated drug fluid via a flow path defined by said passageway (320; 321) to said passageway outlet, and - one or more flushing positions in which the single passageway inlet is fluidly connected to a respective one of said one or more flushing outlets for guiding said flushing fluid through the same flow path defined by said passageway (320; 321) in order to flush said passageway from any drug residuals, and wherein the valve member is prevented from rotating from one drug position to another drug position without passing one of said flushing positions.