A medication container adapter that utilizes a push-pull valve for adapting medication containers for use with enteral syringes that are filled on semi-automatic and automatic filling machinery. The enteral syringes are filled when the medication container is in the inverted filling position. The push-pull valve comprises of a stationary portion and a poppet slidably inserted into the stationary portion. The poppet is an annular member having a central channel and a fluted axial outlet from the central channel. The push-pull valve can be configured to be pressed onto an existing medication container adapter or manufactured as an integrated part of the medication container adapter so that it can either be screwed onto or pressed into the medication container neck.