“First-rate… Milligan is an engaging, canny actor with a gift for natural behavior and the tics of everyday speech. He vividly shows the deep reluctance of his characters to complain while also building steam around the pressures that drive them to snap. And boy do they snap. Milligan has done his research, having toured “Mercy Killers” around the country and now premiering “Side Effects”. The data is authoritative; each incident about a treatment or billing code rings true, winding these guys ever tighter until they blow. We all know that politics is more important than theater, right? But the talk is frequently deeper and better in the theater, where you have to sit, listen and think for an hour or two. Check it out, and reckon with these haggard men before deciding what we ought to do next.”
— The Washington Post