How can I combine the cytokines IL-4, IL-5, and IL-13 into 1 antibody/1 serum of antibody treatment?

I am doing a research project where I have hit a rut. I would like to "make" antibodies for IL-4, IL-5, and IL-13 for an asthma treatment and combine them into 1 serum to be introduced to the blood stream in one shot without disruption or neutralization. Is this possible?