How do get someone to stop chasing you?

Assuming the question is about dreams in which someone is chasing the dreamer; such dreams symbolize persistent problems that the dreamer is avoiding. Confronting and solving the problem in real life will stop the repetitive dream. If the dreamer is able to become lucid within the dream (aware that one is dreaming while experiencing the dream,) one should stop running, turn and confront the (monster/person,) demand its identity, and command it to leave.