Valve assemblies for use with a liquid container and a drug vial for enabling an initial transfer of liquid contents from the liquid container to the drug vial for liquid drug formation purposes and subsequent transfer of liquid drug contents from the drug vial to the liquid container for administration purposes. Liquid drug transfer sets can include a valve assembly pre attached to a liquid container. Alternatively liquid drug transfer sets can include a valve assembly packaged in sterile blister packaging ready for attachment to a liquid container prior to use.
