(2) Cell cycle nonspecific agents (CCNSA): Kill proliferating cells preferentially, act on cells at all phases. (3) Cell cycle specific agents (CCSA) Act at specific phase of the cell cycle.• (2) Cell cycle nonspecific agents (CCNSA): • Kill proliferating cells preferentially, act on cells at all phases. • (3) Cell cycle specific agents (CCSA): • Act at specific phase of the cell cycle