Pegaspargase hypersensitivity reactions: intravenous infusion versus intramuscular injection - a review.

Pegaspargase is a mainstay in the treatment of acute lymphoblastic leukemia. When intravenous (IV) infusion replaced intramuscular (IM) injection as the standard route of administration, there were early reports suggested an increased hypersensitivity reactions (HSRs) rate with IV administration. There have since been eight published reports comparing the incidence of HSRs occurring with IV versus IM pegaspargase.