The present invention relates to a stable compacted, compressed or hard tableted injectable composition, including a vaccine composition comprising at least one freeze dried antigenic component and a dissolution aid. A package containing the above injectable composition and method to facilitate immunizing a subject against a disease comprising the steps of first dissolving the compacted, compressed or hard tableted vaccine composition in a package with a diluent to form a vaccine solution, and administering the resulting vaccine solution in an amount effective for immunizing is also provided.