What does Irene leave behind at the club where she and Jerome were dancing?

Irene leaves behind her heart condition pills at the club where she and Jerome were dancing. This detail is significant as it highlights her vulnerability and the effect her heart condition has on her life. The pills serve as a reminder of her health struggles and underscore the emotional stakes in her relationship with Jerome. Additionally, the absence of the pills signifies a moment of carelessness or oversight, reflecting the tension and excitement of the evening they shared, as well as foreshadowing the challenges that may arise from her health issues. This lost item amplifies the themes of genetic predisposition and the burden of health that runs throughout "GATTACA," reinforcing how personal circumstances shape the characters’ experiences and decisions.