Pegaspargase is an agent that falls under the group of drugs named antineoplastics and was approved for medical use in the US in the year of 1994. The pegaspargase injection use is extremely recommended in the treatment of acute lymphoblastic leukemia (ALL). Often this agent is used along with anthracycline, vincristine, and prednisone. It acts in order to break down the asparagine, reducing its availability for making protein. This medication is used by injection. Pegaspargase uses during pregnancy may be hazardous to the fetus.