Complex sentence: He became medical director of Twentieth Century Fox studios in 1937, where he performed abortions, and dispensed stimulant drugs to the actors, as needed, to keep them alert while films were being shot.
Split into simpler sentences: He became medical director of Twentieth Century Fox studios in 1937. He performed abortions, and dispensed stimulant drugs to the actors, as needed, to keep them alert while films were being shot.