Breakable locking cap for a container comprising a neck

A locking cap for blocking a stopper in a neck of a container for pharmaceutical products, comprising:

• an external body having a breakable part;
• a cage configured to fit into and lock axially in the external body and to surround a collar of a neck of a container in a locked position of the locking cap, the cage having a breakable zone, the cage including:
• an upper ring, against which the stopper bears when the stopper is disposed in the cage;
• a plurality n of branches, which are connected to the upper ring and define therewith a generally cylindrical shape of the cage;
• n/2 first bridges and n/2 second bridges, each interconnecting two adjacent branches, the first bridges and the second bridges being arranged alternately over the periphery of the cage;
• and
• at least one opening tab supported by a second bridge of the n/2 second bridges, the at least one opening tab being inclined toward the outside of the cage and oriented toward the upper ring, the at least one opening tab being adjacent to the breakable zone, the breakable zone located on the second bridge, the breakable zone configured to break in response to application of a tensile force to the at least one opening tab;
• and
• wherein the breakable part of the external body and the breakable zone of the cage are configured such that, when the cap is in the locked position on the container, the breakage thereof enables the cap to be removed from the container.