The present invention relates to a blinding kit for administering a medicament to a patient in a clinical trial, the blinding kit comprising: a first blinding device having an opaque container and having an outlet for administering a liquid substance to a patient and having at least a first and a second inlet, wherein the first inlet is in permanent fluid communication with the outlet and wherein at least the second inlet is disconnected from the outlet, a second blinding device having an opaque container and having an outlet for administering a liquid substance to a patient and having at least two inlets, wherein said at least two inlets are in permanent fluid communication with the outlet.
