The present invention relates to methods and systems for administering antibody therapeutic agents. The methods include administering one or more (e.g., two or three) binding agents, wherein each of the binding agents has a binding region that is specific to a portion of a disease agent and one or more copies of a tag. The binding agents can be specific to one or more portions of the same or different disease agents. The tag is the same for each of the binding agents. The methods include administering an anti-tag antibody, wherein the anti-tag antibody has an anti-tag region that is specific to the tag, and can have an immunoglobulin (e.g., IgA, IgD, IgE, IgG, and IgM.). Disease agents include bacterial proteins, viral proteins, cancer cells, and proteins or toxins produced therefrom. In particular, the present invention includes methods and systems for binding agents that are specific to neurotoxins that cause botulism.