Embodiments of a medical vial holder apparatus and system are disclosed. A main body has a mount engagement portion and a vial engagement portion. A facing wall is attached to the vial engagement portion thereby defining a vial retention cavity therebetween. A lever element is mounted to the main body for pivotal movement between a grip position and a release position. The lever element has a grip portion with a vial engagement face. A grip distance is defined between the vial engagement face and the facing wall. Movement of the lever element from the release position toward the grip position reduces the grip distance. Movement of the lever element from the grip position toward the release position increases the grip distance. The lever element is biased toward the grip position. A plurality of the apparatuses are adjustably mountable in line with one another by way of their mount engagement portions.