An improved tamper evident end cap assembly for a drug loaded syringe which assembly
includes a syringe cap to close the discharge port in the nozzle of the syringe
and an indicator ring about the nozzle connected by chads or tabs to a tubular
shield which chads or tabs are adapted to break freeing the ring from the shield
to loosely wobble on the nozzle indicating tampering if an axial force of separation
is applied to the syringe cap to remove it from the syringe and a one way drive
mechanism engaging both the shield and syringe cap so the shield may be rotated
to advance the assembly onto a syringe nozzle but which is not responsive to counter
rotation to withdraw the syringe cap to open the discharge port and gain access
to the drug.
