Original sentence: Clozapine has been shown to be the most effective drug in treating schizophrenia but due to it's potential to cause many severe side effects, clozapine relegated it to third-line use.Clozapine is only used in patients after other anti-psychotics have failed
Edited sentence: Clozapine has been shown to be the most effective drug in treating schizophrenia but because of side effects relegate it to third-line use