What is the primary function of excipients in vaccines?

The primary function of excipients in vaccines is to act as diluents or vehicles for drugs or vaccines. Excipients are inactive substances that help to stabilize the active ingredients in a vaccine formulation, ensuring that they remain effective and safe when administered. They can improve the distribution of the active components and enhance the overall delivery of the vaccine, allowing for a more efficient response from the immune system.

While some excipients can have roles in enhancing efficacy or serving as preservatives, their main role is defined by their function as carriers or vehicles that facilitate the administration and stability of the vaccine. This understanding is crucial when considering the formulation and development of vaccines, as excipients play a key role in ensuring that vaccines are effective and safe for use.