Common Side Effects, the Hunt for Marshall and His Healing Mushroom

Common Side Effects is an animated comedic thriller about Marshall and his former lab partner Frances after he discovers a mushroom that can heal almost anything. The discovery puts them in the path o

From Cure to Target

*Common Side Effects*’ Marshall and Frances are research partners who worked together in high school. When Marshall discovers a mushroom capable of curing nearly every disease, their private reunion turns into a flight surrounding a discovery that could affect society as a whole. The “hunt for Marshall” indicated by the title reveals that this treatment has become not merely a miraculous medicine, but a target where competing interests collide.

Pressure Where Comedy Meets Thriller

The work’s conflict takes shape between the two characters’ goal of bringing the mushroom to the world and the efforts of the DEA, major pharmaceutical companies, and international businesspeople trying to stop them. The possibility of a treatment that could save lives collides with organizations seeking to control it, while the tension of the chase is layered with the dry humor characteristic of adult animation.

Joe Bennett and Steve Hely co-created the series, with Mike Judge and Greg Daniels serving as executive producers. The original series premiered in the United States on Adult Swim on February 2, 2025, beginning with two consecutive episodes, after which new episodes aired on Sundays before streaming on Max on Mondays. The series was produced by Bandera Entertainment and Green Street Pictures.