In the television series, it first appears with Blaine DeBeers, a major character in the show and the Seattle zombie world.
Vials of tainted utopium when mixed with Max Rager will instantly turn its user into a zombie.
The primary sources of Utopium in Seattle are the Blue Cobras and Mr. Boss. However, throughout the series there are many variations of Utopium.
Besides the normal type, there is tainted Utopium (originally cut by Gabriel), which makes its users zombies when mixed with the energy drink, Max Rager.