Narcotic access can now be controlled and its access audited with the new Knox MedVault. With this drug locker, controlled substances are secured until authorized personnel access them via their unique PIN code. An audit trail showing the time, date and PIN code is recorded each time the vault is opened. With the patent pending Virtual Interlock Validator, the door of the unit must be closed and locked for the audit trail to record that box is secured. The MedVault unit stores one to 5,000 unique PIN codes and 25,000 events. The audit trail is collected by connecting the MedVault unit to a PC via a USB port.