A valve for administering two or more drug fluids, comprising: a rotational axis, a housing having: - an inner cavity, - an inner circumferential surface, - one flushing inlet for receiving a flushing fluid, the flushing inlet being fluidly connected to a flushing outlet, which opens into the inner cavity and is positioned on a first level with respect to the rotational axis, and - a plurality of drug inlets (D1-D4), each drug inlet for receiving an associated drug fluid and each drug inlet being fluidly connected to an associated drug outlet opening into the inner cavity and being positioned on a second level that is different from the first level; and a valve member having: - an outer circumferential surface, and - a main passageway presenting an inlet arranged in the outer circumferential surface at the second level and an outlet arranged coaxially with the rotational axis; wherein the valve member is arranged to be rotated into any selected one of a plurality of drug positions, each drug position being associated with a respective one of said drug outlets; characterised in that: in each selected drug position, the drug outlet which is associated with the selected drug position is fluidly connected to both the inlet of the main passageway and to the flushing outlet; the valve further comprises a distribution channel for carrying the flushing fluid, and formed at an interface between the housing and the valve member, said distribution channel being circumferentially oriented in relation to the rotational axis and fluidly connected to the flushing outlet; and the valve member further comprises a transfer channel for carrying the flushing fluid, the transfer channel being fluidly connected to the distribution channel and extending at least partly in the direction of the rotational axis towards the second level. a rotational axis, a housing having: - an inner cavity, - an inner circumferential surface, - one flushing inlet for receiving a flushing fluid, the flushing inlet being fluidly connected to a flushing outlet, which opens into the inner cavity and is positioned on a first level with respect to the rotational axis, and - a plurality of drug inlets (D1-D4), each drug inlet for receiving an associated drug fluid and each drug inlet being fluidly connected to an associated drug outlet opening into the inner cavity and being positioned on a second level that is different from the first level; and - an inner cavity, - an inner circumferential surface, - one flushing inlet for receiving a flushing fluid, the flushing inlet being fluidly connected to a flushing outlet, which opens into the inner cavity and is positioned on a first level with respect to the rotational axis, and - a plurality of drug inlets (D1-D4), each drug inlet for receiving an associated drug fluid and each drug inlet being fluidly connected to an associated drug outlet opening into the inner cavity and being positioned on a second level that is different from the first level; and a valve member having: - an outer circumferential surface, and - a main passageway presenting an inlet arranged in the outer circumferential surface at the second level and an outlet arranged coaxially with the rotational axis; - an outer circumferential surface, and - a main passageway presenting an inlet arranged in the outer circumferential surface at the second level and an outlet arranged coaxially with the rotational axis; wherein the valve member is arranged to be rotated into any selected one of a plurality of drug positions, each drug position being associated with a respective one of said drug outlets; characterised in that: in each selected drug position, the drug outlet which is associated with the selected drug position is fluidly connected to both the inlet of the main passageway and to the flushing outlet; the valve further comprises a distribution channel for carrying the flushing fluid, and formed at an interface between the housing and the valve member, said distribution channel being circumferentially oriented in relation to the rotational axis and fluidly connected to the flushing outlet; and the valve member further comprises a transfer channel for carrying the flushing fluid, the transfer channel being fluidly connected to the distribution channel and extending at least partly in the direction of the rotational axis towards the second level. in each selected drug position, the drug outlet which is associated with the selected drug position is fluidly connected to both the inlet of the main passageway and to the flushing outlet; the valve further comprises a distribution channel for carrying the flushing fluid, and formed at an interface between the housing and the valve member, said distribution channel being circumferentially oriented in relation to the rotational axis and fluidly connected to the flushing outlet; and the valve member further comprises a transfer channel for carrying the flushing fluid, the transfer channel being fluidly connected to the distribution channel and extending at least partly in the direction of the rotational axis towards the second level.