Collar assemblies for multidose vials, and related systems and methods of use

A system for securing multidose vials, the system comprising:

• a collar assembly comprising a first member and a second member, the first member defining one or more first openings and a first lock hole and the second member defining one or more second openings, a second lock hole, and a tether hole, wherein the one or more second openings positioned to at least partially align with the one or more first openings and the second lock hole positioned to align with the first lock hole;
• a tether securable to the tether hole of the second member and an automatic dispensing machine;
• and
• a lock configured to extend through the first lock hole and the second lock hole, wherein when the lock extends through the first lock hole and the second lock hole, the first member is secured to the second member with the one or more first openings aligned with the one or more second openings to form one or more through holes extending through the collar assembly and defined at least partially by the first member and at least partially by the second member, the one or more through holes being sized to fit around a neck of a multidose vial between a base and a head of the multidose vial to secure the multidose vial to the collar assembly.