Device for monitoring the administration of medication in a syringe that in one embodiment comprises a support element provided with a housing for a port access for coupling the syringe, said port access, when arranged in the housing, defining a longitudinal axis corresponding to the coupling direction and a transversal plane perpendicular to said axis and which passes through the port access. One or more cameras arranged in the support element that encompass in its/their visual fields the cylinder of the syringe when the syringe is coupled to the port access. The one or more cameras are placed within said plane, the optical axes of the one or more cameras intersecting said longitudinal axis, the support element and the one or more cameras do not overlap with the cylinder of the syringe in the direction defined by said longitudinal axis when the syringe is coupled to the port access.