Full cast of Common Side Effects

Dave King

Marshall Cuso (voice)

10 episodes

Emily Pendergast

Frances Applewhite (voice)

10 episodes

Mike Judge

Rick Kruger (voice)

10 episodes

Martha Kelly

Agent Harrington (voice)

10 episodes

Joseph Lee Anderson

Agent Copano (voice)

10 episodes

Sue Rose

Hildy (voice)

8 episodes

Shannon Woodward

Amelia (voice) / Diane (voice) / Linda Tree (voice)

8 episodes

Ben Feldman

Nick (voice) / Frat Guy (voice) / Bud Budrigger (voice)

8 episodes

Sydney Tamiia Poitier

Cecily (voice)

7 episodes

Shalita Grant

Susan (voice) / Kelly (voice) / Oncologist (voice) / Female DEA Agent (voice)

6 episodes

Danny Huston

Jonas Backstein (voice)

6 episodes

Steve Hely

Rusty (voice)

6 episodes

Christine Ko

Kiki (voice)

5 episodes

Alan Resnick

Zane (voice)

3 episodes

Lin Shaye

Sonia (voice)

3 episodes

Bob Stephenson

Line Guy 2 (voice) / Connor (voice) / Samurai (voice)

3 episodes

Timothy Simons

DEA Dispatcher (voice) / Lawyer (voice) / Test Subject 3 (voice)

3 episodes

Jon Foor

Hoang (voice)

3 episodes

Andy Daly

Mysterious Passenger (voice) / Christopher (voice)

2 episodes

Nicolas Cantu

Tommy (voice)

1 episode