A fluid medication delivery system comprises a primary medication reservoir, a secondary medication reservoir, an infusion pump, a first valve assembly, a second valve assembly, a first y-site, and a fluid flow sensor assembly. The primary medication reservoir has a first fluid. The secondary medication reservoir has a second fluid. The infusion pump pumps fluid from at least one of the primary medication reservoir and the secondary medication reservoir. The first valve assembly controls the flow of fluid from the primary medication reservoir in a first fluid line segment. The second valve assembly controls the flow of fluid from the secondary medication reservoir in a second fluid line segment. The fluid flow sensor assembly determines the flow rate of a fluid from the secondary medication reservoir in the second fluid line segment.