All That Jazz (1979) on Netflix

Choreographing and picking dancers for his current show whilst editing his feature film about a stand-up comedian is getting to Joe Gideon. Without the chemical substances, he would not have the energy to keep up with his girlfriend, his ex-wife, and his special dancing daughter. They attempt to bring him back from the brink, but it's too late for his exhausted body and stress-ravaged heart. He chain-smokes, uses drugs, sleeps with his dancers and overworks himself into open-heart surgery. Scenes from his past life start to encroach on the present and he becomes increasingly aware of his mortality.