Drixenol "Drix" Koldreliff, commonly known as Drix, is the deuteragonist of the animated segment of the film Osmosis Jones. A cold-supressant pill with the taste of fruity flavor tasked in eliminating viruses, Drix serves as the main enforcer and best buddy of the title name character Osmosis Jones, assisting the bloody cell as they defend the body of Frank Detorre from Thrax, eventually defeating the virus and saving Frank's life.
In the events of Heroes vs. Villains, Drix appears as an alien enforcer, rather than pill itself, and an agent of the Galactic Federation, defending the galaxy from the forces of the evil.