A sealing device for a medication vial which is highly efficient and easy to use. The sealing device comprises a valve and a compressible stopper. Fitted vertically on top the valve and stopper is a coupling portion. When a syringe is coupled to the sealing device, the syringe compresses the stopper which in turn exposes an aperture defined in a central neck portion of the valve. As medication is withdrawn from the vial, the medication enters the valve and travels through the central neck where it then exits through its open apertures and subsequently into the syringe itself. As the syringe is withdrawn, the stopper is allowed to expand or relax which again closes the apertures defined within the central neck of the valve, thereby ceasing the flow of medication through the sealing device.