Ellen Burstyn has joined the cast of Showtime’s drama pilot Possible Side Effects, set within the world of the pharmaceutical industry.

According to Variety, Burstyn will play the matriarch of the Hunt family, a powerful but dysfunctional brood that runs a drug company that gets into a heap of trouble. Josh Lucas is already attached to star, as is Tim Blake Nelson.

Tim Robbins is writing and directing Possible Side Effects, and exec producing with Elaine Goldsmith-Thomas and Daniel Thomas.