Besponsa is given as an infusion (drip) into a vein lasting for at least one hour. The infusions are given on days 1, 8 and 15 of a 3 or 4 week treatment cycle. The doctor may interrupt treatment or reduce the dose, if the patient develops certain serious side effects.. BESPONSA is a type of medicine called an antibody-drug conjugate. BESPONSA is designed to find and attach to a specific protein, called CD22, found on leukemia cells BESPONSA is designed to find and attach to a specific protein, called CD22, found on leukemia cells. BESPONSA is given by a healthcare provider directly into the bloodstream through a needle in the vein. This is known as an intravenous, or IV infusion. It takes about one hour to receive BESPONSA . BESPONSA should be administered under the supervision of a physician experienced in the use of cancer therapy and in an environment where full resuscitation facilities are immediately available. When considering the use of BESPONSA as a treatment for relapsed or refractory B cell ALL, baseline CD22 positivity of > 0% using a validated and sensitive assay is required prior to initiating treatment (see section 5.1).. Besponsa is given in "cycles". One Besponsa treatment cycle is made up of a single Besponsa dose given each week for 3 weeks. A doctor or nurse will give you your Besponsa dose gradually over 1 . BESPONSA is administered by 1-hour IV infusion on Days 1, 8, and 15 of each 3- to 4-week cycle. BESPONSA is supplied as a 0.9 mg single-dose vial. Each vial is reconstituted with 4 mL of Sterile Water for Injection, USP, to obtain a concentration of Please refer to the full Prescribing Information for complete Dosage and Administration instructions. Administration3,5 (CPT®) The information .