Abstract: In an intravenous fluid administration assembly, there is provided a suspended, fluid holding container having a stopper closing off its mouth, a conduit having a hollow spike inserted into the stopper for gravity flow delivery of fluid from the container to the conduit, and a clamp for preventing the unintentional separation of the spike from the stopper. The clamp has a first portion having an opening through which the container's neck extends downwardly and a second portion having an opening through which the spike extends upwardly. The first portion seats on an abutment on the container's neck and the second portion seats under a flange extending outwardly from the spike. First ends of the first and second portions are connected by a third portion of the clamp and the openings in the first and second portions extend to those portions' other free ends.