The Vortex is a play in three acts by the English writer and actor Noël Coward. The play depicts the sexual vanity of a rich, ageing beauty, her troubled relationship with her adult son, and drug abuse in British society circles after the First World War. The son's cocaine habit is seen by many critics as a metaphor for homosexuality, then taboo in Britain. Despite, or because of, its scandalous content for the time, the play was Coward's first great commercial success.