ASH Clinical News May 2015 | Page 50

IMPORTANT SAFETY INFORMATION (CONT’D) Infusion Reactions (cont’d) • For patients with preexisting cardiac or pulmonary conditions, monitor more frequently throughout the infusion and the post-infusion period since they may be at greater risk of experiencing more severe reactions. Hypotension may occur as part of the GAZYVA infusion reaction. Consider withholding antihypertensive treatments for 12 hours prior to and during each GAZYVA infusion, and for the first hour after administration until blood pressure is stable. For patients at increased risk of hypertensive crisis, consider the benefits versus the risks of withholding their antihypertensive medication Tumor Lysis Syndrome (TLS) • Acute renal failure, hyperkalemia, hypocalcemia, hyperuricemia, and/or hyperphosphatemia from TLS can occur within 12-24 hours after the first infusion. Patients with high tumor burden and/or high circulating lymphocyte count (>25 x 109/L) are at greater risk for TLS and should receive appropriate tumor lysis prophylaxis with antihyperuricemics (eg, allopurinol) and hydration beginning 12-24 hours prior to the infusion of GAZYVA. For treatment of TLS, correct electrolyte abnormalities, monitor renal function and fluid balance, and administer supportive care, including dialysis, as indicated Infections • Serious bacterial, fungal, and new or reactivated viral infections can occur during and following GAZYVA therapy. Fatal infections have been reported with GAZYVA. Do not administer GAZYVA to patients with an active infection. Patients with a history of recurring or chronic infections may be at increased risk of infection Neutropenia • GAZYVA, in combination with chlorambucil, caused Grade 3 or 4 neutropenia in 33% of patients. Patients with Grade 3 to 4 neutropenia should be monitored frequently with regular laboratory tests until resolution. Anticipate, evaluate, and treat any symptoms or signs of developing infection • Neutropenia can also be of late onset (occurring more than 28 days after completion of treatment) and/or prolonged (lasting longer than 28 days) • Patients with neutropenia are strongly recommended to receive antimicrobial prophylaxis throughout the treatment period. Antiviral and antifungal prophylaxis should be considered Thrombocytopenia • GAZYVA, in combination with chlorambucil, caused Grade 3 or 4 thrombocytopenia in 10% of patients in the trial. In 4% of patients, GAZYVA caused acute thrombocytopenia occurring within 24 hours after the GAZYVA infusion. Fatal hemorrhagic events duri