Vial adapters including a skirt having a transverse directed top surface and a pair of opposite downward depending snap fit flex members each integrally formed with an inward directed ridge for telescopically snap fitting onto a vial opening and an upright finger grip extension. Manual inward urging of the pair of opposite finger grip extensions towards one another flexes the pair of opposite snap fit flex members at the top surface such that their pair of opposite inwardly directed ridges are outwardly urged from one another thereby releasing a previously snap fitted drug vial.
